glast large area telescope: manufacturing preparation design engineering meeting jerry clinton 1...
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GLAST Large Area Telescope:GLAST Large Area Telescope:
Manufacturing Preparation
Design Engineering Meeting
Jerry Clinton
1 April 2003Stanford Linear Accelerator Center
Stanford, CA
Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope
Procurement Process FlowProcurement Process Flow
Start ProcurementProcess
Part/mat’lapproved byPCB/MPRB?
Drawing/specreleased?
Funding inplace?
Complete part/material approval
process
No
Complete drawingor spec and get it
released
No
Get fundingauthorized
Yes
Complete PR onBIS and print it out
Ensure first words inDescription block areGLAST PARTS.Delivery location is BLDG33, NOT YOUR OFFICE
QA review andapproval
Preparesupporting
documentationpackage
Sole source?
Complete SoleSource Justifica-tion Form (Pur-
chasing web page)
Yes
Yes
Specification(s) Drawing(s) Quotation (if recent) Sole Source Justification
Ensure document-tion package isclearly labeled
GLAST
Deliverdocumentation
package to TomMurphy
IPO review andapproval
Debbie or Dianaenter PR into BIS
Yes
No
Memo format is no longeracceptable. All questionsmust be answered. Personalpreference is not adequatejustification for sole sourceprocurement.
Support buyer asrequested
End
GLAST LAT Procurement Process
QA review
Manufacturing RequirementsManufacturing Requirements
• Drawings and specifications must be released• Parts and materials must be listed on PIL and must be approved
by PCB or MPRB as appropriate• All parts and materials must be issued from flight stores• Completed flight assemblies must be kept in flight stores • Work must be authorized via an approved Assembly and
Inspection Data Sheet (AIDS)
Manufacturing ProcessManufacturing Process
• Closed loop– Parts and materials issued in kits from stores– Kit is assembled, tested, and inspected– Delivery of assembled kit to stores closes the loop– Maintains clear traceability of parts, materials, and finished
flight items• Approved AIDS is required to start the process
– Applies to fabrication, assembly, test, and inspection• Does not apply to fabrication where supplier procures
raw materials– If work is to be performed by a subcontractor, their travelers
should be attached, or PO should require supplier to make them available for review by SLAC and Government personnel
Manufacturing Process - ContinuedManufacturing Process - Continued
• Stock room verifies item is ready for manufacturing prior to pulling kit– Drawings and/or specifications released– Test procedures released– Parts approved
• Completed AIDS ends the process– Last step is to deliver to stores
Assembly and Inspection Data SheetsAssembly and Inspection Data Sheets
• AIDSs are LAT work orders– Authorize taking parts and materials out of stores and
performing work to manufacture flight hardware– Defines operations executed to fabricate, assemble, and test
LAT hardware items– Provide traceability from raw materials to finished flight
items– Required for all LAT manufacturing activities including
outside fabrication and assembly• LAT-MD-01624
– AIDS preparation instructions– Provides some guidelines on work instruction preparation
• Accessed from Quality Assurance web page