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Structural Model Gap Analysis

National Shipbuilding Research Program (NSRP)

Integrated Logistics Environment (ILE)

Sharing Structural Design Data with Manufacturing Systems across Shipyards (Subtask 1.2)

Document Tracking Number NSRP-ILE-1.2-002

Revision Number 1.0

Revision Date 21 January 2011

Prepared by Michael Olson, Northrop Grumman Technical ServicesDavid Pierce, Northrop Grumman Technical ServicesPete Lazo Product Data Services Corporation

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Document Number: NSRP-ILE-1.2-002 Rev: 1.0Document Title: ILE Structural Model Gap Analysis

Revision Log

Rev Date Reason for Change Page(s)

1.0 Draft 7 January 2011 Initial Draft for ILE Team Meeting in

Norfolk, VA All

1.0 21 January 2011 Final updates for delivery Sections 1.3, 3.1, 3.2, Table 5, Section 5.1 (Acronyms)

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Table of Contents1.0 Business Context.................................................................................................1

1.1 Objectives........................................................................................................................1

1.2 Background.....................................................................................................................1

1.3 Scope..............................................................................................................................1

1.4 Assumptions....................................................................................................................3

2.0 Gap Analysis Approach.......................................................................................42.1 Data.................................................................................................................................4

2.2 Analysis Approach..........................................................................................................4

3.0 Gap Analysis Results...........................................................................................63.1 ISPE Common Data Mapping to SCIM...........................................................................6

3.2 Mapping to SCIM..........................................................................................................30

3.3 SCIM Structural Model Gap Summary..........................................................................30

4.0 Reference Documents........................................................................................385.0 Terminology........................................................................................................39

5.1 Acronyms......................................................................................................................39

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Table of FiguresFigure 1-1 - Shipbuilding Product Models.....................................................................................2

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Table of TablesTable 1: ISPE Build Tree Entity Mapping to SCIM.......................................................................7

Table 2: ISPE Component Entity Mapping to SCIM...................................................................10

Table 3: ISPE Part Entity Mapping to SCIM...............................................................................14

Table 4: ISPE Common Attribute Mapping to SCIM...................................................................16

Table 5: AP 218 SCIM Structural Model Gap Summary............................................................31

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1.0 Business Context

1.1 ObjectivesThe objective of this document is to analyze and describe the gaps identified between the ship structural design information required by shipyard manufacturing systems (documented in Reference [1]) and the Ship Common Information Model (SCIM) Structural Design chapter. The SCIM Structural Design chapter defines the Navy shipbuilding-specific structural design data requirements derived from the STEP AP 218 standard (Reference [2]).

1.2 BackgroundOver the past several years the National Shipbuilding Research Program (NSRP) Integrated Shipbuilding Environment (ISE) project has been developing and prototyping tools to enable interoperability among shipyard and Navy systems. Recently, a specification for the next generation Navy shipbuilding Integrated Product Data Environment (IPDE) system was written as part of the Navy Product Data Initiative (NPDI) project. Included in the IPDE specification is the Ship Common Information Model (SCIM), an information model derived from the STEP Shipbuilding Application Protocols, which defines the minimum set of entities, attributes, and relationships required to support Navy shipbuilding data exchange requirements.

1.3 ScopePhase 1 of the Integrated Logistics Environment (ILE) project will apply the tools, methods, and information models developed by the ISE team and the NPDI SCIM project to two current shipbuilding requirements: VIRGINIA Class IPDE data migration (subtask 1.1) and the sharing of structural design information with manufacturing systems across shipyards (subtask 1.2). The project will validate the capabilities of the NPDI SCIM as a means for supporting interoperability within and among the shipyards and the Navy. Phase 2 of the ILE project will complete the remaining chapters of the SCIM document, as well as update existing chapters to incorporate lessons learned during the validation efforts undertaken in phase 1.

Subtask 1.2 of ILE Phase 1 is focused on the requirements for sharing structural design information with manufacturing systems across shipyards. The scenario of efficiently exchanging ship product data from design to manufacturing, whether it is within the same shipyard or between two shipyards, has repeated itself time and again in recent years. Historically, the shipyards have not had a viable method for importing structural design data from one shipyard into the manufacturing system of another shipyard. In addition, there are currently very few, if any, systems in place to translate design data to the manufacturing systems of other yards.

Subtask 1.2 addresses the exchange of structural design data from the prime designer to a manufacturing yard, either within the same shipyard or in a second shipyard, and analyzes whether the SCIM provides a sufficient data model to facilitate this exchange. The approach for this task is to define the data model for the exchange of structural design data with manufacturing using existing programs as examples, compare the data model to the SCIM data model, identify gaps in the SCIM data model, and make recommendations for improving the SCIM. These tasks will be documented in four deliverables:

• Structural Model Import Requirements Report

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• SCIM Gap Analysis Report• SCIM Dataset Results Report• Final Import Results Report

This document is the second of the four deliverables. The specific scope of this document is to define the gaps between the structural design data required by manufacturing and the SCIM Structural Design chapter. The structural design data required by manufacturing was identified using the work of the NSRP Integrated Steel Processing Environment (ISPE) project and example data for the CVN 21 and DDG 1000 programs. These requirements are documented in the first deliverable for the project, Structural Model Import Requirements (Reference [1]).

Figure 1-1 depicts a notional set of product models in the center, their general content on the left, and the functions which produce or consume the data in the various product models on the right. The focus of this task is on the exchange of the Design Product Model with manufacturing in order to perform the production planning function and develop the 3D Manufacturing Product Model (indicated by the yellow box). This information was compared to the SCIM Structural Design chapter to validate the SCIM content for meeting the design to manufacturing data exchange requirements.

Scantling Design

3D Detailed Design

3D Manufacturing

2D Neutral Piece Parts

2D Shipyard Piece Parts

Detailed Design

Product Models Functions

Production Planning

Piece PartDevelopment

Manufacturing Definition

Nesting

NC

Drawings &Reports

• Moulded Forms & Lines• Preliminary scantlings• Structural systems• Unit Breakdown

• Structural Part Definition• Structural Part Relationships• Seams• Features

• Assembly breakdown• Assembly order• Welds• Bevels • Bending lines

• Flat pattern parts• Marking Lines

• Shipyard specific parts• Added material• Marking lines, Labeling• Tabs• Manufacturing Aids

Figure 1-1 - Shipbuilding Product Models

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1.4 AssumptionsThe following assumptions are made regarding the scope of this effort:

• The Shipyard Common Process Model developed previously for the NSRP Integrated Steel Processing Environment (ISPE) project is still an accurate high level depiction of the shipyard design and manufacturing processes

• While internal processes and systems may be different within different shipyards, a similar set of design data is required to perform the manufacturing functions

• This effort is focused on common 3D Detailed Design Product Model and 3D Manufacturing Product Model, not specific data required to feed shipyard-specific manufacturing tools

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2.0 Gap Analysis Approach

This section describes the approach for performing the gap analysis between the structural model exchange requirements, identified in the Structural Model Import Requirements Report, and the SCIM Structural Design chapter. The detailed results of the gap analysis are described in Section 3.0.

2.1 DataThree primary sets of data were used to perform the analysis. The first set of data was from the NSRP Integrated Steel Processing Environment (ISPE) project. The ISPE project documented a set of common processes and data for the development and exchange of structural design and manufacturing information across several shipyards including NGSB-GC (Avondale and Ingalls), NGSB-NN, and General Dynamics Electric Boat. This information is documented in the ISPE Shipyard Requirements Final Report (Reference [3]).

The second set of data was from the DDG 1000 program, specifically the design data being transferred from Catia V5 to Teamcenter Enterprise and the data planned for transfer from Teamcenter Enterprise to Teamcenter Manufacturing to support the Manufacturing Planning process.

The third set of data was from the CVN 21 program. This data included the product model data for Design, Manufacturing, and Planning as well as sample entities and attributes from the Catia V4 design tool.

This data is described in the first project deliverable, Structural Model Import Requirements (Reference [1]).

2.2 Analysis ApproachThe overall approach to the SCIM gap analysis was to understand the current content of the SCIM AP 218 chapter, analyze and organize the data obtained for DDG 1000 and CVN 21 to facilitate an orderly comparison with the SCIM, and then perform mappings between the project data and the SCIM data to identify any gaps in the SCIM data.

An initial analysis was performed to obtain an understanding of the derivation of the SCIM AP 218 data entities and attributes relative to the AP 218 Application Reference Model (ARM) and several context schemas developed on the ISE-4 project for structural features, lofting, and manufacturing. This analysis highlighted entities not included in the SCIM AP 218 chapter and reasons for their exclusion. It also provided a baseline understanding of the SCIM AP 218 data from which further analysis and mapping could be performed.

The structural design data obtained from the DDG 1000 and CVN 21 projects were analyzed to understand the information and organize it in a way that would facilitate comparison with the SCIM data. An initial attempt to organize the data according to the ISPE common data organization revealed that this approach would not facilitate direct comparison to the SCIM. Because of this, a decision was made to organize the data according to the main structural entities defined in the SCIM: structural systems/assemblies, plates, and profiles. Once the data was organized in this manner, a mapping was performed between the project data and the SCIM.

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An analysis was also performed on the ISPE common data requirements to understand this information and assess its applicability to the current SCIM validation effort. It was determined that the common processes and data described in the ISPE final report were still representative of the shipyard processes and data requirements, making this another good source of information for comparison to the SCIM. The common entities and attributes identified in the ISPE project were mapped to the SCIM to identify potential gaps in the SCIM data.

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3.0 Gap Analysis Results

3.1 ISPE Common Data Mapping to SCIMThe ISPE project defined a set of common data requirements including the following information:

Entity Categories

Attribute Categories

Attribute Names

Entity Relationship Diagram

This section provides a mapping of ISPE common data requirements to the SCIM and identifies gaps. Table 1 provides a mapping of ISPE Build Tree entities to the SCIM. Table 2 provides a mapping of ISPE Component entities to the SCIM. Table 3 provides a mapping of ISPE Part entities to the SCIM. Table 4 provides a mapping of ISPE Common Attributes to the SCIM. For each of these tables an attempt was made to map the ISPE entities/attributes to SCIM entities/attributes. “No mapping” was used to indicate that an appropriate mapping to the SCIM does not exist at this time, and that updates to the SCIM may be required to resolve the issue. A final disposition for each “No mapping” will be included in the next deliverable (SCIM Dataset Results Report).

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Table 1: ISPE Build Tree Entity Mapping to SCIM1

Entity Business Description AP218 SCIM Mapping Comment

Ship Hull Molded Lines define the geometry of a hull as a surface without thickness. Typically, the inside surface of flush shell plating is on the molded line, as is the underside of deck plating.

npd:Physical_assemblynpd:Physical_occurrenceAP218 assembly

There needs to be a npd:physical_occurrence for each npd:design_occurrence as the ship moves from design to manufacturing. They are linked via association: npd:Design_occurrence_physical_occurrence.

The npd:Physical_assembly is linked to the npd:Physical_occurrence by the associations: - npd:Physical_assembly_child - npd:Physical_assembly_parent

Module A Module or a Superlift is a section of a ship consisting of several units. Module size is subject to each shipyards capacity and processes. For example, the LHD 5 ship produced at Ingalls consisted of 5 Modules.



The npd:Physical_assembly is linked to the npd:Physical_occurrence by the associations: - npd:Physical_assembly_child - npd:Physical_assembly_parent

1 Recommend handling build trees in AP218 SCIM by adding AP218 entity assembly as a sub-type of npd:Physical_occurrence.

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Unit A Unit is the last assembly level before the Module. Units are typically the basis for planning, reporting, and scheduling.



The npd:Physical_assembly is linked to the npd:Physical_occurence by the associations: - npd:Physical_assembly_child - npd:Physical_assembly_parent

Build Tree Level 1

Build Tree Level 1 is comprised of Build Tree Level 2 plus additional parts




Build Tree Level 2

Build Tree Level 2 is comprised of the next lower Build Tree Level plus additional parts




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Build Tree Level X

Build Tree Level X is the lowest level construction assembly




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Table 2: ISPE Component Entity Mapping to SCIM

Entity Business Description AP218 SCIM Mapping CommentFrame Planes Frame Planes are reference lines

which can be stiffened with plates or profiles.

npd:Structural_system_functional_definition.The_function="frame"

Deck A Deck is a continuous horizontal strength member inside a ship hull that supports equipment and personnel.

npd:Structural_system_functional_definition.The_function="deck"

also"strength_deck""accomodation_deck""main_deck""weather_deck""navigation_deck""platform_deck""deck_in_superstructure"

Platform/Flat A Platform/Flat is a horizontal, non-strength, non-continuous surface inside a ship’s hull.

npd:Structural_system_functional_definition.The_function="platform_deck"

"flat" NOT IN THE SCIM. Recommend "user_defined" for "flat".

Girder A Girder has the following definitions: 1. A continuous member running fore-and-aft under a deck to support the deck and deck beams. 2. The vertical fore-and-aft plate members on the ship's bottom (shell and tanktop only).

npd:Structural_system_functional_definition.The_function="girder"

also"longitudinal_girder"

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Entity Business Description AP218 SCIM Mapping CommentBulkhead Bulkhead is a term applied to

the vertical partition walls which subdivide the interior of a ship into compartments. Various types of bulkheads (transverse, longitudinal, forepeak, watertight, wire-mesh, pilaster, etc.) are distinguished by their location, use, material type, or fabrication method.

npd:Structural_system_functional_definition.The_function="bulkhead"

Floor A Floor is a vertical transverse plate immediately above the bottom shell plating, often located at every frame, extending from bilge to bilge above the shell plating to tank top only.

npd:Structural_system_functional_definition.The_function="floor"

Sponsons Extensions of the ship's hull to accommodate the flight deck, weapons system, refueling platforms, etc…

No Mapping Recommend adding “sponsons” to npd:Structural_system_functional_definition.The_function.

Transverse Bent

Transverse structural arches that support the Flight Deck.

No Mapping Recommend adding “transverse_bent” to npd:Structural_system_functional_definition.The_function.

Web Frame A Web Frame is a built up frame to provide extra strength, usually consisting of a web plate which is flanged, or otherwise stiffened, on its edge. Web frames are typically spaced several frames apart, with smaller regular frames in between.

npd:Structural_system_functional_definition.The_function="web_frame"

also"vertical_web_frame""transverse_web_frame"

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Entity Business Description AP218 SCIM Mapping CommentInnerbottom / Double Bottom / Bilge

The area of the ship between the tank top and shell, includes all structural members in between (i.e. floors, longitudinals, etc…)

npd:Structural_system_functional_definition.The_function="inner_bottom"npd:Structural_system_functional_definition.The_function="double_bottom"npd:Structural_part_functional_definition.The_function="bilge_plate"npd:Plate_functional_definition.The_function="bilge_plate"

also"bottom"

Stringer Bar Angle connecting the deck plate to the shell plate.

npd:Structural_system_functional_definition.The_function="stringer"

Deck Beam An athwartship horizontal structural member, usually a rolled shape, supporting a deck or a flat.

npd:Structural_system_functional_definition.The_function="deck_beam"npd:Profile_functional_definition.The_function="deck_beam"

Profile Extruded run of standard structural material used to strengthen or otherwise support plated structures. They are made from stock profile material (T's, angles, bulbs, etc.) and are often described in terms of their Web and Flange components. Profiles are also used in foundation design to support machinery or equipment.

npd:Profile_functional_definition.The_function= [appropriate enumeration value of <xs:simpleType name="Structural_part_functionality">]

i.e.:"bracket""stiffener""longitudinal_stiffener""transversal_stiffener""carling""beam""deck_beam""pillar""hold_pillar""user_defined"

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Entity Business Description AP218 SCIM Mapping CommentCommodity Components

Standard components such as brackets and collars.

npd:Structural_system_functional_definition.The_function="bracket"npd:Structural_part_functional_definition.The_function="bracket"npd:Profile_functional_definition.The_function="bracket"

"collar" NOT IN THE SCIM; recommend adding to npd:Structural_system_functional_definition.The_function,npd:Structural_part_functional_definition.The_functionnpd:Profile_functional_definition.The_function

Recommend adding other commodity components when identified.

Breast Hook A Breast Hook is a triangular plate bracket joining port and starboard side stringers at the stem.

No Mapping Recommend adding “breast_hook” to npd:Structural_system_functional_definition.The_function.

Stanchion A Stanchion is a vertical column supporting decks, flats, girders, etc.

No Mapping Recommend adding “stanchion” to npd:Structural_system_functional_definition.The_function.

Foundation A Foundation is a structural support for boilers, engines, gears, machinery, etc.

npd:Structural_system_functional_definition.The_function="engine_foundation"

Other foundation types NOT IN SCIM; recommend adding "foundation" to npd:Structural_system_functional_definition.The_function.

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Table 3: ISPE Part Entity Mapping to SCIM

Entity Business Description AP218 SCIM Mapping CommentPlate Part A Plate Part is the lowest level

assembly structural component which has manufacturing data, and can be cut from flat plate. This does not include "hardware" (i.e. washers) or hardware-like accessories.

npd:Plate_functional_definition.The_function="standard_plate"simpletype: Structural_part_functionality:

"standard_plate""doubling_plate""shedding_plate""clip""watertight_clip""lug""bracket""face_plate""carling""flange""web""frame""bilge_plate""user_defined"

Shell Plate Shell Plates form the outer side and bottom skin of the hull.

No Mapping NOT IN THE SCIM; recommend adding the following enumeration to SCIM and AP218:

simpleType name="Structural_part_functionality"npd:Plate_functional_definition.The_function="shell_plate"

Note: simpletype Structural_system_functionality has the complementary enumeration values:

"outer_shell""inner_shell""double_shell"

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Entity Business Description AP218 SCIM Mapping CommentProfile Part A Profile Part is the lowest level

assembly structural component which has manufacturing data, and can be cut from profile stock such as I-beams or flat bar.

npd:Profile_functional_definition.The_function="standard_plate"simpletype: Structural_part_functionality:

"stiffener""longitudinal_stiffener""transversal_stiffener""beam""deck_beam""pillar""hold_pillar""user_defined"

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Table 4: ISPE Common Attribute Mapping to SCIM

Entity Category

Attribute Category Common Attribute Name AP218 SCIM Mapping Comment

Build Tree Physical Description

Footprint Assembly_manufacturing_position.assembly_footprint Mass Assembly_manufacturing_definition.mass Center of Gravity Assembly_manufacturing_definition.centre_of_gravity Manufacturing Orientation Assembly_manufacturing_position.orientation

Configuration Management

Identifier npd:Physical_occurrence.Id Version npd:Physical_occurrence.Version Hull Applicability npd:Ship.Hull_number

npd:Hull_applicability.Start_hullnpd:Hull_applicability.End_hull

Need to revisit Hull Applicability vs Ship in PDM chapter. Reference Piping 227 recommended changes.

Include npd:Physical_occurrence in this review.

Associations:npd:Ship_physical_occurrence

Does Ship need association to npd:Hull_applicability?

Scheduling Start Production Date Estimate No Mapping Does AP 218 SCIM need additional dates?

End Production Date Estimate No Mapping Does AP 218 SCIM need additional dates?

Start Production Date Actual No Mapping Does AP 218 SCIM need additional dates?

End Production Date Actual Assembly_manufacturing_definition.production_dateStatus No Mapping Does AP 218 SCIM need status?

Routing Next Production Stage No Mapping Does AP 218 SCIM need next production stage?

Current Production Stage Assembly_manufacturing_definition.assembly_stage

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Entity Category


General Fabrication/Manufacturing Methods

Assembly_manufacturing_definition.assembly_method

Drawing No Assembly_manufacturing_definition.assembly_drawingDesign Component

Description Component_Type npd:Structural_system_functional_definition.The_functionnpd:Panel_system_functional_definition.The_functionnpd:Plate_strake_functional_definition.The_function

npd:Structural_part_functional_definition.The_functionnpd:Plate_functional_definition.The_functionnpd:Profile_functional_definition.The_function

Mass Mass is handled in parts in SCIM. See Part-plate and Part-profile below.

Center of Gravity Center of Gravity is handled in parts in SCIM. See Part-plate and Part-profile below.

Manufacturing Orientation Manufacturing Orientation is handled in build tree in SCIM. See Build Tree/Physical Description/Manufacturing Orientation above.

Material_Type Material_Type is handled in parts in SCIM. See Part-plate and Part-profile below (Material_code).

Thickness_Throw npd:Panel_system_design_definition.Material_offsetGeometric_Origin No Mapping Derivable from the geometry. Not

stored in the SCIM.Max_Length_neat No Mapping Derivable from the geometry. Not

stored in the SCIM.Min_Length_neat No Mapping Derivable from the geometry. Not

stored in the SCIM.Load_bearing-strength_requirements

No Mapping

Material characteristics (type) No Mapping Need to add to AP218 SCIM material entity. No such attribute now.Type is at part level.

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Entity Category


Material characteristics (thickness)

npd:Panel_system_design_definition.Thickness

Material characteristics (grade) No Mapping Need to add to AP218 SCIM material entity. No such attribute now.Grade is at part level.

Attached/adjacent structural entities

Attached: npd:Structural_system_relationshipAdjacent: npd:Structural_system_adjacency_relationship

- Relative thickness No Mapping- Joining requirements No Mapping- Relative material types No Mapping- Structural entity types No Mapping- Orientation No MappingLocation and orientation within the ship

No Mapping Derivable from the geometry. Not stored in the SCIM.

Process requirements such as shaping

No Mapping

Assembly sequence See build tree, assemblies Build tree identifies the parts in the assembly but not the sequence.

Routing (shop assignments) No MappingConfiguration Management

Identifier npd:Design_occurrence.IdVersion npd:Design_occurrence.Version

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Entity Category


Hull Applicability npd:Ship.Hull_numbernpd:Hull_applicability.Start_hullnpd:Hull_applicability.End_hull





Manufacturable Component

Design Attributes

*All the attributes of a Design Component plus the following

See Above

Yard and Shop Specific Mfg. Attributes

Added_material npd:Structural_added_material_feature_design_definition.Added_material_length

Applied to Part-plate and Part-profile only.

Removed_material No Mapping Chamfers npd:Corner_cutout_design_definition "A Corner_cutout_design_definition

may specify the design_definition for either a Corner_cutout (see4.2.42) or an Edge_feature (see 4.2.73). Material is removed along the direction of the Z-axis. If theZ-axis is oriented along the part edge, the Corner_cutout_design_definition specifies an Edge_feature(see 4.3.26 for the application assertion). If the Z-axis is oriented perpendicular to the part edge, theCorner_cutout_design_definition specifies an Corner_cutout (see 4.3.25 for the applicationassertion)".

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Entity Category


Welding_access_and_clearance_features

No Mapping

Ships_reference_lines_for_erection

AP 218 structural_part_manufacturing_definition.top_layout_marksAP 218 structural_part_manufacturing_definition.bottom_layout_marks

Need to add AP 218 structural_part_manufacturing_definition to SCIM.

NOTE: review ISE 4, ISPE Final Report, table 7 to determine if marking lines and labels require more detailed definition in SCIM.

Long_Point_or_Short_Point_geometry

No Mapping

Beveling npd:Corner_cutout_design_definition "A Corner_cutout_design_definition may specify the design_definition for either a Corner_cutout (see4.2.42) or an Edge_feature (see 4.2.73). Material is removed along the direction of the Z-axis. If theZ-axis is oriented along the part edge, the Corner_cutout_design_definition specifies an Edge_feature(see 4.3.26 for the application assertion). If the Z-axis is oriented perpendicular to the part edge, theCorner_cutout_design_definition specifies an Corner_cutout (see 4.3.25 for the applicationassertion)".

Surface_Clearance No Mapping Part-plate Description Part_Type npd:Structural_part_functional_definition.The_function

npd:Plate_functional_definition.The_function

Units npd:Definition.local_units (association) Do we have capability to use global units in SCIM for all parts?

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Entity Category


Material_code No Mapping Need to add AP 218 entity, homogeneous_ship_material_property

Review homogeneous_ship_material_property.material_reference andhomogeneous_ship_material_property.description for applicability to the SCIM. Consider changing "description" to "Material_code".

Plate_thickness npd:Plate_design_definition.Thickness Min-max_extent No Mapping Area No Mapping Center_Of_Gravity No Mapping Replace

npd:Plate_design_definition.Mass with new property: npd:Plate_design_definition.weight_and_centre_of_gravity.

Need to add AP218 entity, weight_and_centre_of_gravity to SCIM.

Center_Of_Gravity is assigned to weight_and_centre_of_gravity.centre_of_gravity.

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Entity Category


Weight npd:Plate_design_definition.Mass Replace npd:Plate_design_definition.Mass with new property: npd:Plate_design_definition.weight_and_centre_of_gravity.


Weight is assigned to weight_and_centre_of_gravity.weight.

Length_and_width No Mapping Geometry 2D: plate_manufacturing_definition properties

3D: plate_manufacturing_definition.representations

Quantity Required quantity No Mapping Can be derived from product model instances.

Nested quantity No Mapping Nesting N/AConfiguration Management

Identifier npd:Plate_design_definition.Id Version npd:Plate_design_definition.Version

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Entity Category


Hull Applicability npd:Ship.Hull_numbernpd:Hull_applicability.Start_hullnpd:Hull_applicability.End_hull





Scheduling Estimated Start No Mapping Does AP 218 SCIM need additional dates?

Actual_Start No Mapping Does AP 218 SCIM need additional dates?

Status No Mapping Does AP 218 SCIM need additional dates?

Mfg. and Design Associations

Weld npd:Weldnpd:Weld_design_definitionnpd:Welded_jointnpd:Welded_joint_design_definitionAP 218 weld_manufacturing_definition

Need to add AP 218 weld_manufacturing_definition to SCIM.

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Entity Category


Edge Prep npd:Corner_cutout_design_definition "A Corner_cutout_design_definition may specify the design_definition for either a Corner_cutout (see4.2.42) or an Edge_feature (see 4.2.73). Material is removed along the direction of the Z-axis. If theZ-axis is oriented along the part edge, the Corner_cutout_design_definition specifies an Edge_feature(see 4.3.26 for the application assertion). If the Z-axis is oriented perpendicular to the part edge, theCorner_cutout_design_definition specifies an Corner_cutout (see 4.3.25 for the applicationassertion)".

Penetrations npd:Feature_design_definition (3D)AP 218 structural_part_manufacturing_definition.inner_contours (2D)AP 218 structural_part_manufacturing_definition.top_punch_point (2D/3D)AP 218 structural_part_manufacturing_definition.bottom_punch_point (2D/3D)


Marking Line AP 218 structural_part_manufacturing_definition.top_layout_marksAP 218 structural_part_manufacturing_definition.bottom_layout_marks


NOTE: review ISE 4, ISPE Final Report, table 7 to determine if marking lines and labels require more detailed definition.

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Entity Category


Label AP 218 structural_part_manufacturing_definition.top_annotationAP 218 structural_part_manufacturing_definition.bottom_annotation



Nest tape No Mapping Process & route No Mapping Manufacturing aid No Mapping

General Programmer No Mapping Job_number No Mapping Job_name No Mapping Drawing_number npd:Document_metadata engineering_remarks No Mapping

Part-profile Description Part_Type npd:Structural_part_functional_definition.The_functionnpd:Profile_functional_definition.The_function

Units npd:Definition.local_units (association) Do we have capability to use global units in SCIM for all parts?

Material_code No Mapping Need to add AP 218 entity, homogeneous_ship_material_property

Review homogeneous_ship_material_property.material_reference andhomogeneous_ship_material_property.description for applicability to the SCIM. Consider changing "description" to "Material_code".

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Entity Category


Plate_thickness npd:Profile_cross_section.Designation npd:Profile_cross_section.Designation is the profile equivalent to a plate thickness. The Designation provides the name of the profile cross section from which pertinent profile information can be derived.

Min-max_extent No Mapping Area No Mapping Center_Of_Gravity No Mapping Replace

npd:Profile_design_definition.Mass with new property: npd:Profile_design_definition.weight_and_centre_of_gravity.


Center_Of_Gravity is assigned to weight_and_centre_of_gravity.centre_of_gravity.

Weight npd:Profile_design_definition.Mass Replace npd:Profile_design_definition.Mass with new property: npd:Profile_design_definition.weight_and_centre_of_gravity.


Weight is assigned to weight_and_centre_of_gravity.weight.

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Entity Category


Length_and_width No Mapping Geometry 2D: plate_manufacturing_definition properties

3D: plate_manufacturing_definition.representations

Quantity Required quantity No Mapping Can be derived from product model instances.

Nested quantity No Mapping Nesting N/AConfiguration Management

Identifier npd:Plate_design_definition.Id Version npd:Plate_design_definition.Version Hull Applicability npd:Ship.Hull_number

npd:Hull_applicability.Start_hullnpd:Hull_applicability.End_hull





Scheduling Estimated Start No Mapping Does AP 218 SCIM need additional dates?

Actual_Start No Mapping Does AP 218 SCIM need additional dates?

Status No Mapping Does AP 218 SCIM need status?Mfg. and Design Associations

Weld npd:Weldnpd:Weld_design_definitionnpd:Welded_jointnpd:Welded_joint_design_definitionAP 218 weld_manufacturing_definition

Need to add AP 218 weld_manufacturing_definition to SCIM.

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Entity Category


Edge Prep npd:Corner_cutout_design_definition "A Corner_cutout_design_definition may specify the design_definition for either a Corner_cutout (see4.2.42) or an Edge_feature (see 4.2.73). Material is removed along the direction of the Z-axis. If theZ-axis is oriented along the part edge, the Corner_cutout_design_definition specifies an Edge_feature (see 4.3.26 for the application assertion). If the Z-axis is oriented perpendicular to the part edge, theCorner_cutout_design_definition specifies an Corner_cutout (see 4.3.25 for the applicationassertion)."

Penetrations npd:Feature_design_definition (3D)AP 218 structural_part_manufacturing_definition.inner_contours (2D)AP 218 structural_part_manufacturing_definition.top_punch_point (2D/3D)AP 218 structural_part_manufacturing_definition.bottom_punch_point (2D/3D)


Marking Line AP 218 structural_part_manufacturing_definition.top_layout_marksAP 218 structural_part_manufacturing_definition.bottom_layout_marks



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Entity Category


Label AP 218 structural_part_manufacturing_definition.top_annotationAP 218 structural_part_manufacturing_definition.bottom_annotation



Nest tape No Mapping Process & route No Mapping Manufacturing aid No Mapping

General Programmer No Mapping Job_number No Mapping Job_name No Mapping Drawing_number npd:Document_metadata engineering_remarks No Mapping

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3.2 Mapping to SCIMThis section provides a mapping of sample structural design data to the SCIM and identifies gaps. A detailed mapping of NGSB-NN Catia data to SCIM is provided in the following Excel spreadsheet. The spreadsheet also includes a mapping of ISPE Common Data to SCIM as well as a summary of the gaps and discussions and recommendations from the 11 January 2011 ILE team meeting in Norfolk, VA. A detailed README tab is also included which describes the contents of the spreadsheet.

The mapping of sample NGSB-GC data to SCIM has not been completed yet, but will be included in the next deliverable (SCIM Dataset Results Report).

3.3 SCIM Structural Model Gap SummaryTable 5 provides a summary of the SCIM Structural Model Gaps identified in this analysis, along with recommended changes to the SCIM Structural Design chapter. A final disposition of the gaps will be included in the next deliverable (SCIM Dataset Results Report).

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Table 5: AP 218 SCIM Structural Model Gap Summary

Gap Category Issue Comments/RecommendationSCIM Structural manufacturing chapter entity candidates

The following AP 218 entities are not included in SCIM:

assemblyassembly_bounding_boxassembly_relationshiphomogeneous_ship_material_propertyship_material_propertystructural_added_material_boundary_relationshipweld_filler_materialannotationplate_manufacturing_definitionprofile_manufacturing_definitionstructural_part_manufacturing_definitionweld_manufacturing_definitionelectrode_chemical_compositionstructural_cutout_manufacturing_relationshipweld_testing;assembly_manufacturing_definitionassembly_manufacturing_positioncentre_location

Candidates for SCIM Structural manufacturing chapter based on analysis of AP 218 SCIM entity mapping to ISE 4 manufacturing entities.

Since there are so few entities to add, recommend augmenting the existing AP218 SCIM design chapter with these entities.

There will be one context schema but SCIM AP 218 chapter will identify/list what entities/associations are used in a given exchange (design, planning, or manufacturing).

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Gap Category Issue Comments/RecommendationMissing AP218 SCIM material attributes

The following NN Catia Attributes do not map to SCIM:

MaterialDensityQualityMATERIAL_DESCRIPTIONMATERIAL_REVISION_LEVELTREATMENT SPECMATERIAL_CONTROL_LEVEL

The following ISPE attributes map to AP218 material entities:

Design Component/Description/Material characteristics (type)Design Component/Description/Material characteristics (grade)

Add the following AP218 material entities to SCIM:

ship_material_propertyhomogeneous_ship_material_property

Ensure piping (AP 227) has a corresponding material model.

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Gap Category Issue Comments/RecommendationAssembly concept missing The following NN Catia assembly Attributes do not map to SCIM:

PARENTPLN1PLN2P02_BASE_LVL NAMEP03_PLANNING LVL 3 ITM #P03_PLANNING LVL 3 NAMEP04_PLANNING LVL 4 ITM #P04_PLANNING LVL 4 NAMEP05_PLANNING LVL 5 ITM #P05_PLANNING LVL 5 NAMEP06_PLANNING LVL 6 ITM #P06_PLANNING LVL 6 NAMEP07_PLANNING LVL 7 ITM #P07_PLANNING LVL 7 NAMEP08_PLANNING LVL 8 ITM #P08_PLANNING LVL 8 NAMEP09_PLANNING LVL 9 ITM #P09_PLANNING LVL 9 NAMEP10_PLANNING LVL 10 ITM #P10_PLANNING LVL 10 NAMEP11_PLANNING LVL 11 ITM #P11_PLANNING LVL 11 NAMEP12_PLANNING LVL 12 ITM #P12_PLANNING LVL 12 NAME

Need to address concept of assemblies (design, planning, and manufacturing) in PDM/AP218 SCIM.

Address assembly in PDM chapter, i.e., solve in PDM. Specialize in other chapters (e.g., structures) if needed.


The npd:Physical_assembly is linked to the npd:Physical_occurrence by the associations: npd:Physical_assembly_childnpd:Physical_assembly_parent

Discuss how to represent build trees.

Recommend adding AP218 entity assembly to AP218 SCIM. Subtype AP218 entity assembly from npd:Physical_occurrence.

SCIM AP215/ AP218 Arrangements The following NN Catia Attributes do not map to SCIM:

COMPARTMENT_NOZONELEVEL

Consider adding a lightweight arrangements concept in PDM or even move AP215 to PDM. The goal is to avoid a separate AP215 export.

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Gap Category Issue Comments/RecommendationMissing AP218 & SCIM planning/manufacturing entities

The following NN Catia Attributes do not map to SCIM:

CONSTRUC_AREA_LVLTEMP_STR_CUT_TO_SUITTEMP_STR_REQD_LIFT_TYPE

Need to add to AP218/SCIM planning/manufacturing entities.

Issue: no mapping to SCIM, no AP 218 entity available to add to SCIM.

Review for new SCIM chapter based on ISE 4 steel processing recommendations, especially for Catia attributes:

OP CODESECONDARY OP1SECONDARY OP2SECONDARY OP3SECONDARY OP4

Enhance npd:Design_occurrence The following NN Catia Attributes do not map to SCIM:

ESWBSCOST_CLASSMATERIAL_COST_CLASS

Need to add attributes to PDM/SCIM npd:Design_occurrence.

Electric Boat concurs: add to PDM, npd:Design_occurrence

This is also needed by planning.

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Gap Category Issue Comments/RecommendationPDM change model improvement The following NN Catia Attributes do not map to SCIM:

HOLD-UP_01HOLD-UP_02HOLD-UP_03HOLD-UP_04HOLD-UP_05HOLD-UP_06HOLD-UP_07HOLD-UP_08HOLD-UP_09HOLD-UP_10CONST DWG REMARKS 1CONST DWG REMARKS 2REMARKS

Candidates for improvements to PDM change model. May need associations to show parts that hold up other parts.

Consider portions of NIDDESC CM model incorporated into PDM.

Be sure AP239 does not cover this.

SCIM Analysis chapter The following NN Catia Attributes do not map to SCIM:

Y Axis Shear AreaZ Axis Shear AreaAngle of Main Axis of Inertia

Candidates for AP209 (analysis) chapter.

The CAD system may compute this data. If so it can be derived from SCIM data. However, if this is human defined (e.g., section properties), consider exchanging this in libraries, especially catalog parts.

Manufacturing Macro Names The following NN Catia end cut related Attributes do not map to SCIM:

EndCut 1 Design Macro NameEndCut 2 Design Macro NameENDCUT 1 MFG MACRO NAMEENDCUT 2 MFG MACRO NAME

Recommend adding npd:Feature_design_definition.Name property for this. "Name" currently does not exist.

Robotic macro names are yard specific, therefore may not be needed for data exchange. Review endcuts on next row.

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Gap Category Issue Comments/RecommendationEndcut definition The following NN Catia manufacturing related Attributes do not map to

SCIM: ENDCUT 1 MFG P00 ENDCUT 2 MFG P00 ENDCUT 1 MFG P01 ENDCUT 2 MFG P01ENDCUT 1 MFG P02 ENDCUT 2 MFG P02 ENDCUT 1 MFG P03 ENDCUT 2 MFG P03ENDCUT 1 MFG P04 ENDCUT 2 MFG P04ENDCUT 1 MFG P05 ENDCUT 2 MFG P05ENDCUT 1 MFG P06 ENDCUT 2 MFG P06ENDCUT 1 MFG P07 ENDCUT 2 MFG P07ENDCUT 1 MFG P08 ENDCUT 2 MFG P08ENDCUT 1 MFG P09 ENDCUT 2 MFG P09ENDCUT 1 MFG P10 ENDCUT 2 MFG P10ENDCUT 1 MFG P11 ENDCUT 2 MFG P11ENDCUT 1 MFG P12 ENDCUT 2 MFG P12ENDCUT 1 MFG P13 ENDCUT 2 MFG P13ENDCUT 1 MFG P14 ENDCUT 2 MFG P14ENDCUT 1 MFG P15 ENDCUT 2 MFG P15ENDCUT 1 MFG P16 ENDCUT 2 MFG P16ENDCUT 1 MFG P17 ENDCUT 2 MFG P17ENDCUT 1 MFG P18 ENDCUT 2 MFG P18ENDCUT 1 MFG P19 ENDCUT 2 MFG P19ENDCUT 1 MFG P20 ENDCUT 2 MFG P20ENDCUT 1 MFG P21 ENDCUT 2 MFG P21ENDCUT 1 MFG P22 ENDCUT 2 MFG P22ENDCUT 1 MFG P23 ENDCUT 2 MFG P23ENDCUT 1 MFG P24 ENDCUT 2 MFG P24

Recommend adding to appropriate npd:Feature_design_definition or subclass. TBD manufacturing operation needs to be added to AP218 SCIM, which may be part of structural manufacturing SCIM chapter.

Need library of endcut definitions taking CPC into account.

Desire is to handle this in a generic way as parametric manufacturing features. Consider including secondary operations in a similar manner.

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Gap Category Issue Comments/RecommendationHangers The following NN Catia hanger related Attributes do not map to SCIM:

HANGER_IDHANGER_PART_IDDWG_NO_OR_SPECASSEMBLYSYSTEM_DESIGNATORDWG NO. OR SPEC DOCHANGER ASSY NO

Ensure SCIM can handle hangers:

Verify AP227 (piping, electrical, and HVAC) can handle hangers.

Ensure AP218 can handle hangers within its scope (manufactured hangers).

Need to review catalog hangers vice piece built hangers.

Different yards address hangers differently. Some are more catalog centric. NGSB-GC and NN may handle hangers as CAD reservations in some cases, but actually create the hangers in the field.

NGSB-GC has Standard Procedure (SP) books from which the field decides how to implement a given hanger. The SP book may give several options for a given situation. This may be a “don't care” in a Design to Design exchange, but may be important in a Design to Manufacturing exchange.

Further research required. Need to handle hangers by discipline. Consider a separate chapter on Outfitting and Furnishings.

Shipyard/ISPE attributes do not map to SCIM

Numerous Catia Attributes and ISPE attributes do not map to SCIM. Review each occurrence in the raw data, reevaluate, and disposition.

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4.0 Reference Documents

NumberDocument Number / Revision Document Title

[1] NSRP-ILE-1.2-001, V1.4, 5 November 2010

Structural Model Import Requirements

[2] ISO 10303-218:2004(E): 2004-11-15

STEP AP 218

ISO 10303-218

Industrial automation systems and integration - Product data representation and exchange -

Part 218: Application protocol: Ship structures

[3] 27 January 2003 Integrated Steel Processing Environment (ISPE) Shipyard Requirements Final Report

[4] N/A SCIM Chapter 4: Structural (AP 218)

Structural_001.zip: AP218_Structural.pdf (text)

AP218 diagrams.doc (context diagrams)at URL:

http://www.isetools.org/eb-cgi-bin/yabb2_ISE/YaBB.pl?num=1222711663

expanded_context_schema_pdm_218_merged_009.xmlat URL:


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5.0 Terminology

5.1 AcronymsThe following is a list of all acronyms used in this document:

Acronym Definition

DWG Drawing

2D two dimensional

3D three dimensional

AP Application Protocol

CAD Computer-Aided Design

CATIA Computer Aided Three-Dimensional Application

CVN21 CVN21 is the project name used by the U.S. Navy, its contractors, and Congress to denote the development of the next design in supercarriers. CVN 21 is a reference to the next class fixed wing nuclear carrier (CVN) for the 21st Century.

DDG 1000 USS Zumwalt (DDG-1000) is the lead ship of the Zumwalt class of guided missile destroyers.

ILE Integrated Logistics Environment

ILS Integrated Logistics Support

IPDE Integrated Product Data Environment

ISE Integrated Shipbuilding Environment

ISE-4 Fourth ISE project addressing four areas: Electrical, Engineering Analysis, Ship Arrangement, and Steel Processing (CAD to CAM)

ISO International Organization for Standardization

ISPE Integrated Steel Processing Environment

Mfg manufacturing

NGSB Northrop Grumman ShipBuilding

NGSB-GC Northrop Grumman Shipbuilding – Gulf Coast

NGSB-NN Northrop Grumman Shipbuilding – Newport News

NGTS Northrop Grumman Technical Services

NPDI Navy Product Data Initiative

NSRP National Shipbuilding Research Program

PDM Product Data Management

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Acronym Definition

PREP preparation

SCIM Ship Common Information Model

STEP Standard for the Exchange of Product Model Data, is a comprehensive ISO standard (ISO 10303) that describes how to represent and exchange digital product information.

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