ed batch 1

8/22/2019 ED BATCH 1

http://slidepdf.com/reader/full/ed-batch-1 1/22

SEQUENTIAL AND SIMULTANOEUS

DESIGN PROCESS

Presented by Batch 1

Akilesh Khanna(09A202)

Anish Kumar.V(10A205)

Jothi Raj.P(10A217)Kishore.H(10A220)

Nandha Kumar.K(10A226)

Thiyagaprabhu.S.S(11A448)

1

8/22/2019 ED BATCH 1


INTRODUCTION

• DESIGN :design is an interactive-creative

decision making process directed towards the

fulfilment of human needs.

• Machine design: it is defined as the use of

scientific ,technical information and

imagination in the description of a machine or

a mechanical system to perform specificfunctions with maximum economy and

efficiency

© 2010 Wiley 2

8/22/2019 ED BATCH 1


DESIGN PROCESS

• The engineering design process is a

formulation of a plan or scheme to assist an

engineer in creating a product

• Market survey defining specification of

product selection of mechanism

layout of configured mechanism design of

individual component

© 2010 Wiley 3

8/22/2019 ED BATCH 1


Methods of design process

1.Sequential /conventional/traditional

2.simultaneous/concurrent

© 2010 Wiley 4

8/22/2019 ED BATCH 1


sequential engineering

• Traditional engineering, also known as

sequential engineering.

• It is the process of marketing, engineering

design, manufacturing, testing and production

where each stage of the development process

is carried out separately, and the next stage

cannot start until the previous stage isfinished.

© 2010 Wiley 5

8/22/2019 ED BATCH 1


Sequential Engineering

• Sequential design process is called

as “over-the-wall” design process

• Each function did its work and

passed it to the next function

© 2010 Wiley 6

8/22/2019 ED BATCH 1


sequences

• Conventional design process takes place in asequence .

• It begins with market survey, with the aid of

finding out the requirements of the customer.• This information is then headed over to the

design department in the form of a ‘ product

brief’ .• The design department prepares the design

and makes few prototype samples for testing.

© 2010 Wiley 7

8/22/2019 ED BATCH 1


Contd…

• These detail are then passed to theproduction department for their approval.

• The production suggests changes in the designand sent the drawing back to the design

department.• This process of sending the drawing by the

design department to the productiondepartment and from production departmentback to the design department continues tillthe design is finalised and in between valuabletime is lost.

© 2010 Wiley 8

8/22/2019 ED BATCH 1


Concurrent design process

• Concurrent Engineering (CE) is a systematicapproach to integrated product developmentthat emphasizes the response to customerexpectations.

• It embodies team values of co-operation, trustand sharing in such a manner that decisionmaking is by consensus, involving all

perspectives in parallel, from the beginning of the product life cycle.-Concurrent DesignFacility (ESA):

© 2010 Wiley 9

8/22/2019 ED BATCH 1


Concurrent engineering

10

8/22/2019 ED BATCH 1


Concurrent design process

• In recent years, the sequential design process is replaced

by simultaneous or concurrent design process.• Concurrent engineering is a work methodology based on

the parallelization of tasks

• Here the various activities are carried out in parallel,

instead of in series.• It refers to an approach used in product development in

which functions of design engineering, manufacturingengineering and other functions are integrated to reducethe elapsed time required to bring a new product to the

market.• All functions form a design team that develops

specifications, involves customers early, solves potentialproblems, reduces costs, & shortens time to market.

© 2010 Wiley 11

8/22/2019 ED BATCH 1


Contd…

• The basic premise for concurrent engineeringrevolves around two concepts.

• The first is the idea that all elements of a

product’s life-cycle, from functionality,producibility, assembly, testability,maintenance issues, environmental impactand finally disposal and recycling, should betaken into careful consideration in the earlydesign phases.

© 2010 Wiley 12

8/22/2019 ED BATCH 1


Contd…

• The second concept is that the preceding

design activities should all be occurring at the

same time, or concurrently

• The overall goal being that the concurrent

nature of these processes significantly

increases productivity and product quality,

aspects that are obviously important intoday's fast-paced market.

© 2010 Wiley 13

8/22/2019 ED BATCH 1


Contd..

• A part of the design process is to ensure that

the entire product's life cycle is taken into

consideration.

• This includes establishing user requirements,

propagating early conceptual designs, running

computational models, creating physical

prototypes and eventually manufacturing theproduct.

© 2010 Wiley 14

8/22/2019 ED BATCH 1


Single engineering discipline

• The concurrent design trend is to bring the design andmanufacturing activities together as a singleengineering discipline.

• In this process , a team of specialists examines the

design from different angles.• The specialists include a manufacturing engineer, tool

engineer, field personnel, reliability engineer andsafety engineer.

• They consider various aspects of the product and aresimultaneously considered early in the design stage.

• For example, manufacturing and assembly aresimultaneously considered with stress analysis.

© 2010 Wiley 15

8/22/2019 ED BATCH 1


Example

Titan Linkabit

-Develops circuit boards

- CAE technical manager, Chip Ciradot

-old CAD system: 21 weeks to develop 8-layer

circuit board.

-Implemented new CAE tools and CE

-New circuit board: 12 weeks to develop, 10

layers, twice the functionality of the 8 layer.

© 2010 Wiley 16

8/22/2019 ED BATCH 1


Product Design Process

• Idea developments selection affects

– Product quality

–

Product cost – Customer satisfaction

– Overall manufacturability – the ease with which

the product can be made

© 2010 Wiley 19

8/22/2019 ED BATCH 1


The Product Design Process

Step 1 - Idea Development - Someone thinks of a need and a

product/service design to satisfy it: customers, marketing,

engineering, competitors, benchmarking, reverse engineering

Step 2 - Product Screening - Every business needs a

formal/structured evaluation process: fit with facility and

labor skills, size of market, contribution margin, break-evenanalysis, return on sales

Step 3 – Preliminary Design and Testing - Technical

specifications are developed, prototypes built, testing starts

Step 4 – Final Design - Final design based on test results, facility,equipment, material, & labor skills defined, suppliers

identified

© 2010 Wiley 20

8/22/2019 ED BATCH 1


Highlights

• Product design is the process of deciding onthe unique characteristics and features of a

company’s product Process selection is thedevelopment of the process necessary toproduce the product being designed.

• Steps in product include idea generation,product screening, preliminary design andtesting, and final design

© 2010 Wiley 21

ed batch 1

Documents