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

AIDS List ScreenAIDS List Screen

AIDS Entry Screen (Top Portion)AIDS Entry Screen (Top Portion)

AIDS Entry Screen (Bottom Portion)AIDS Entry Screen (Bottom Portion)

Check ScreenCheck Screen

AIDS List with New RecordAIDS List with New Record

Report ScreenReport Screen

Update ScreenUpdate Screen

Updated Report ScreenUpdated Report Screen