A1258690294kZOmf

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GLAST Large Area Telescope Performance Safety
Assurance Darren S. Marsh Stanford Linear
Accelerator Center Performance Safety Assurance
Manager Marsh_at_SLAC.Stanford.Edu (650)
926-4577
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Performance Assurance Activities

• LAT Mission Assurance Requirements (MAR) Status
• LAT MAR dated October 26, 2000 is still currently
  the baseline MAR
• Phase C/D/E MAR (revised MAR) in negotiation
• Primary changes involve Chapter 4, Design
  Verification and the addition of flight software
  deliverables
• LAT EEE Parts, Materials and Processes Issues
• LAT EEE Parts and Materials and Processes Lists
  will be submitted to GSFC middle of April
• Any additional submissions to these lists must be
  provided to Jeff Tice (materials) or Nick Virmani
  (EEE parts)
• All fasteners must comply with the procurement
  documentation and test requirements for flight
  hardware and critical ground support equipment
  fasteners contained in 541-PG-8072.1.2, GSFC
  Fastener Integrity Requirements
• EEE parts must have parts stress analyses
  performed (MAR par. 8.2.2) for conformance with
  the applicable derating guidelines

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Performance Assurance Activities (Cont.)

• Procurement quality assurance
• Quality Clauses are required in all flight
  hardware contracts and requisitions
• Ensure that appropriate quality requirements are
  included in all procurements of flight
  hardware/software and critical GSE
• All flight hardware shall have a receiving
  inspection
• Assure all required traceability documentation
  accompanies hardware
• Assure proper storage and control of flight
  hardware
• Enable detection of hardware discrepancies
• Only qualified providers are utilized for
  products and services that will be used for
  flight hardware
• QA shall perform supplier, partner, and
  subcontractor surveys when necessary

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Verification Planning

• LAT Program Instrument Performance Verification
  Plan, LAT-MD-00408, Systems Performance Assurance
  (Section 6), delineates the processes and
  procedures for verification and test of LAT
  hardware and software
• Required Documentation
• Configuration Management
• Configuration Item Tracking
• Quality Assurance Provisions
• Safety
• Test Equipment
• Test Performance Requirements

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Verification Test Planning (Cont.)

• Systems Engineering shall assure that all flight
  hardware/software requirements are identified and
  adequately flowed down and tested
• A test matrix is generated which relates all
  explicit and derived hardware/software
  requirements to the specific test phase/method
  which will validate it
• Subsystems managers are responsible for subsystem
  verification and test procedure matrix
• ? Test procedures must be developed for each test
  activity
• System Engineering is responsible for instrument
  test and procedure matrix
• ? IT is responsible for developing instrument
  level test procedures
• Quality Assurance/Systems Engineering shall
  verify the traceability matrix is complete and
  accurate

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LAT Test Procedure Matrix
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Verification Testing Deliverables

• Title Performance Verification Procedure
• CDRL No. 331
• Reference MAR Section 4.2.2
• Use Describes how each test activity defined in
  the Verification Plan will be implemented
• Place/Time/Purpose of Delivery
• 15 work days prior to the start of the testing
  for GSFC approval.
• LAT Instrument Thermal Vacuum Balance Test Plan-
  90 days prior to testing
• Preparation Information
• Describe the configuration of the tested item and
  the step-by-step functional and environmental
  test activity conducted at the unit/component,
  subsystem/instrument, and payload levels. Give
  details such as instrumentation monitoring,
  facility control sequences, test article
  functions, test parameters, quality control
  checkpoints, pass/fail criteria, data collection
  and reporting requirements. Address safety and
  contamination control provisions. A methodology
  will be provided for controlling, documenting and
  approving all activities not part of an approved
  procedure and establish controls for preventing
  accidents that could cause personal injury or
  damage to hardware and facilities.

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Verification Testing Deliverable (Cont)

• Title Verification Reports
• CDRL No. 332
• Reference MAR Section 4.2.3
• Use Summarize compliance with system
  specification requirements and/or provide a
  summary of testing and analysis results,
  including conformance, nonconformance, and trend
  data.
• Place/Time/Purpose of Delivery
• Verification Reports Preliminary - 5 work
  days after testing for GSFC information Final -
  30 days after verification activity for GSFC
  information
• LAT Instrument Thermal Vacuum Balance Test Plan-
  90 days prior to testing Instrument
• Performance Verification Report Preliminary -
  At PER for GSFC information Final - 30 days
  following on-orbit check out for GSFC information
• Preparation Information
• Verification Report Provide after each
  unit/component, subsystem/instrument, and payload
  verification activity. For each analysis
  activity the report will describe the degree to
  which the objectives were accomplished, how well
  the mathematical model was validated by the test
  data, and other significant results.

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Hardware Certification End Item Data Package

• Identification
• Unit identification (drawing or part number
  number with revision level)
• Unit serial Number
• Date and time of release for delivery
• Responsible engineer approval
• Quality assurance certification (as required)
• Other approvals as necessary
• Mechanical Summary Data
• Mass
• CG
• Dimensions
• Interface Flatness
• Electrical Summary Data
• Power consumption (steady state, minimum _at_ idle,
  maximum _at_ peak)
• Start-up voltage profile
• Start-up current profile
• Noise Measurement
• Steady state
• Minimum power

• Unit Performance Data (as required and
  applicable)
• Unit Support Data
• Thermistor calibration curves
• Software version report
• Hardware installation record
• Mate/de-mate log
• On-time log with operational hours
• Test Execution Information
• Hi-Pot test
• Isolation test
• Insulation resistance test
• Quality Assurance Data
• Non-conformance report summary
• Inspection records
• Storage, handling, shock records
• Science Calibration and Trending Data
• Per the SVAC Plan
• Other material information as required