GLAST Large Area Telescope

LAT Systems Engineering 2 May 2006

LAT Requirement Sell-off Kickoff

GLAST Large Area TelescopeGLAST Large Area Telescope

Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope LAT Level Verification

LAT LevelRequirement Review Kickoff

Rich BaunSystems Engineering


2LAT Requirement Sell-off Kickoff

AgendaAgenda

Requirement and verification flowdown overview Test Case review process overview Requirements responsibilities Test case review

Test & Verification Websitehttp://www-glast.slac.stanford.edu/systemengineering/Verification%20&%20Test/Verification%20and%20Test.htm



Requirement & Verification FlowdownRequirement & Verification Flowdown

IRD SRD MSS EMI

LAT Spec (00010)

LAT/SC ICD

Env Spec (00778)

MAR

LAT VP (00408)

VCRM (07658)

TV TP (01600)

Dynamics (01196)

EMI TP (02726)

FVM (07659)

Analysis (07980)

P&OTP (02730)

1 2 3 4 5 6 7 8 9LAT00x LAT Power On X X X X X X X X XLAT01x LAT Power Off X X X X X X X X XLAT02x LAT Reinitialization X X P P PLAT031 LAT Electical Power Subsys Performance XLAT04x Establish Science Operations Config X XLAT05x LAT Register Test X XLAT06x SIU/EPU Hardware Functional X XLAT071 LAT Energy Measurement Calibration XLAT12x LAT Science Modes X XLAT13x LAT/Spacecraft I/F Functional X X X X XLAT141 SIIS LAT/Spacecraft I/F Functional XLAT15x LAT Ambient TCS Test X XLAT16x LAT Ambient Survival Htr Test X XLAT17x LAT Conducted & Radiated Emissions X PLAT18x LAT Conducted & Radiated Susceptibility XLAT20x LAT Science Perf Diagnostics X XLAT21x LAT Timing Measure & Adjust X XLAT22x LAT Science Ops Demo X X P P P PLAT23x LAT GRB Handling X X P PLAT30x LAT ACD CPT X XLAT31x LAT ACD LPT X XLAT40x LAT CAL CPT X XLAT41x LAT CAL LPT X XLAT50x LAT TKR CPT X XLAT51x LAT TKR LPT X XLAT521 LAT Config 1 Light Tight Test XLAT651 T&DF False Triggers XLAT661 T&DF Data Transport Errors XLAT70x LAT SVAC Flight Config on Gnd X XLAT711 LAT Config 1 SVAC Muon Calibration XLAT801 LAT Config 1 SVAC Condition Scan (27 V) XLAT811 LAT Config 1 SVAC Condition Scan (29 V) XLAT821 LAT Config 1 SVAC Nominal Rate CR XLAT831 LAT SVAC Nominal Rate CR Data Volume XLAT841 LAT SVAC Nominal Rate Condition Scan CR XLAT85x LATSVAC Nominal Rate Condition Scan CR X X

= Not required for Baseline Test

ConfigurationsTest Case ID

Test Case Name

FinalPre-TV

Sine VibeL

Mount Radiators

AcousticL

T-CycleT-Bal Remove Radiators

Weight CG

Ship to Spectrum

CL L

Receive, Unpack T

L

Pack LAT

CSSC S

BaselineFC S

at SLAC

Ship to NRL

LLL

Pre Post-Axis

L Limited Performance Test

Comprehensive Performance Test

SVAC Test

C

S

F

T

E

TCS Functional Test

EMI/EMC Emissions/Susceptibility Test



SVAC Test

C

S

F

T

E

LAT Functional and FSW Test

TCS Functional Test


Rev date: 24 April 2006

F

NRLPost-Ship

CEMI/EMCL E L

TESTING IN THERMAL VAC CHAMBER

FinalPre-TV

Sine VibeL

Mount Radiators

AcousticL

T-CycleT-Bal Remove Radiators

Weight CG

Ship to Spectrum

CL L

Receive, Unpack T

L

Pack LAT

CSSC S

BaselineFC S

at SLAC

Ship to NRL

LLL

Pre Post-Axis



SVAC Test

C

S

F

T

E

TCS Functional Test




SVAC Test

C

S

F

T

E

LAT Functional and FSW Test

TCS Functional Test


Rev date: 24 April 2006

F

NRLPost-Ship

CEMI/EMCEMI/EMCLL EEE LL

TESTING IN THERMAL VAC CHAMBER

Test Case Matrix

Electrical Test Requirements

Key:= NASA Requirements

= Joint Requirements

= LAT Requirements

= Requirements Flow

= Verification & Validation Plans

= Test & Analysis Plans

= Verification Flow

Abbreviations:FVM = Function Validation MatrixP&OTP = Performance & Operations Test PlanVCRM = Verification Cross Reference Matrix



Test Case/Reqt Buy-Off OverviewTest Case/Reqt Buy-Off Overview



Requirement Owner ResponsibilitiesRequirement Owner Responsibilities

Know which requirements you are responsible to buy-off Know where and how your requirements are sold Determine your requirement type

– Functional – Function not impacted by environments, i.e. Commanding– Environmental – Specific to an environment, usually requires analysis of

environmental test data (Thermal, Dynamics, EMI)– Performance – Requires trending, not sold until after TV

Determine what sells your requirement– Successful completion of a test? Data collected and checked by a test?

Post test analysis of test data? Analysis only?• There are test reports, test logs, configuration files, digi files (if applicable), and

recon files (if applicable) available for review

– The VCRM identifies what tests sell what reqts– Test case outlines show where and how each test sells reqts

Write an NCR if you find an anomaly Provide objective evidence that a requirement is sold

– You must certify the LAT complies to the requirement• Is analysis and a formal report required to document compliance?



How to Report a Requirement sell-offHow to Report a Requirement sell-off

Report the requirement sell-off to Systems– For reqts not needing a formal report (most requirements)

• Send an e-mail with the following information– Requirement number (REQID) or Verification Plan number (VERID)

– Date, time, and run number when supporting test case(s) were run» If data was collected from multiple runs, each run must be noted

– Worse case test data that supports the reqt was sold (if applicable)

– Compliance statement, i.e. the report must state definitively the LAT complies with the requirement

» Margin to the requirement must be stated where appropriate

– Any NCRs or JIRAs associated with the requirement must be listed

– For requirements needing a formal report• Write a Requirements Verification Report (RVR)

– See next slide for details

– You will be notified if a requirement needs an RVR



Requirements Verification ReportsRequirements Verification Reports

For an agreed to subset of LAT requirements only, not all reqts Must have an assigned LAT Docs number Minimum RVR contents

– Requirement owner’s name– Requirement source, text, and number– Verification Plan text and number– Supporting test case name and number (if applicable)– Script name(s) used to run test– Date, time, and run number when supporting test case(s) were run

• If data was collected from multiple runs, each run must be noted

– Compliance statement, i.e. the report must state definitively the LAT complies with the requirement• Margin to the requirement must be stated where appropriate

– Supporting documentation of test data, analysis, and results– Deviations from the verification plan and the reasons for the deviations must

be stated– Any NCRs or JIRAs associated with the requirement must be listed



VCRM ExampleVCRM Example

VERID REQID Topic Requirement Text Verif Method

Verification Plan Verif Status Reqt Owner

Pass/Fail Criteria

Test Proc or Report Name

Verification Data

Compliance (Comply/Not

)LVP337 TDF3-96 T&DF Average Power Consumption

On a per orbit average, the T&DF system shall consume not more than 327.5 W of power.

T5 Verification of TDF3-96 is to be performed in parallel with the verification of LPS487 documented by LVP40. At the end of test cases LAT001 - LAT Configuration 1 Power On and LAT002 - LAT Configuration 2 Power On, (see LAT Performance and Operations Test

Final Verification

Baun

LVP338 TDF3-98 T&DF Peak Power Consumption

The T&DF system shall consume not more than 407.6 W for 10 consecutive minutes.

A5 The requirement TDF3-98 is sold by similarity to requirement LPS500 and is therefore verified by the successful completion of the LVP156 verification plan.

Final Verification

Baun

LVP546 TDF3-229 SIU Peak Power Consumption

The LAT SIU shall consume less than 32 W.

A5 The requirement TDF3-98 is sold by similarity to requirement LPS496 and is therefore verified by the successful completion of the LVP154 verification plan.

Final Verification

Baun

LVP377 TDF3-101 T&DF Single Point Failure Modes

The trigger and dataflow system shall not have any single-point failure modes, which can reduce the instrument to below the minimum effective area specified in

A5 T&DF Reliability AnalysisLAT-TD-00295

Final Verification

Baun

LVP378 TDF3-104 Integration and Test Support

The trigger and dataflow system shall support integration and test of the instrument.

D5 Successful completion of the test cases LAT001 - LAT Config 1 Power On and LAT002 - LAT Config 2 Power On demonstrates that the T&DF supports integration and test by showing the LAT can be configured by command and that the LAT's health and status can be

Final Verification

Baun



Test Case to Requirement Owner Test Case to Requirement Owner (1/2)(1/2)

1 LAT00x LAT Power On Baun, Bielawski, or Bright Baun, Bielawski, Bright, Hascall Baun, Bielawski, Bright, or Hascall2 LAT01x LAT Power Off None Baun, Bielawski, Bright, Hascall Baun, Bielawski, Bright, or Hascall3 LAT02X LAT Reinitialization Bielawski, J. Thayer Baun, Deklotz Baun or Deklotz4 LAT031 LAT EPS Performance Baun, Nelson Bielawski, Nelson Bielawski or Nelson5 LAT04x LAT Establish Baseline Science Ops Config Deklotz Baun, Deklotz Baun or Deklotz6 LAT05x LAT Register Test Baun Hascall Hascall7 LAT06x LAT SIU/EPU Hw Funct Deklotz Baun, Deklotz Baun or Deklotz8 LAT07x LAT Energy Measurement Calibrations None Borgland, Grove, Ritz Borgland or Grove9 LAT12x LAT Science Modes Baun, Deklotz Baun, Deklotz10 LAT13x LAT/SC I/F Functional Baun, Bielawski, Bright,

Goodman, Grove, J. ThayerJ, Thayer, G. Thayer Bright, Bielawski, & Grove

11 LAT14x LAT/SC I/F Functional with the SIIS Baun, Bielawski, Bright J. Thayer, G. Thayer Bright & Bielawski12 LAT15x LAT Ambient TCS Test Goodman, Nelson Goodman, J. Thayer Goodman13 LAT16x LAT Ambient Surv Htr Test Baun, Goodman, Nelson Goodman Goodman14 LAT17x LAT Conducted & Radiated Emissions Bright, Nelson Bright, Nelson Bright & Nelson15 LAT181 LAT Config 1 Conducted & Radiated Susceptibility Bright, Nelson Bright, Nelson Bright & Nelson

16 LAT20x LAT Science Perf Diagnostics Baun, Grove Deklotz, Grove, Ritz Borgland & Deklotz17 LAT21x LAT Timing Measure & Adjust Baun, Grove Borgland, Grove, Ritz Grove18 LAT22x LAT Science Ops Demos Baun, Grove Borgland, Grove, Ritz Borgland & Grove

Item Test Case ID

Test Case Name Requirement Owners Expert Reviewers Must Review all runs to evaluate Performance Data



Test Case to Requirement Owner Test Case to Requirement Owner (2/2)(2/2)

19 LAT23x LAT GRB Handling Baun, Bielawski Deklotz, Grove, Ritz Borgland & Deklotz20 LAT30x LAT ACD CPT Bright, Nelson, Thompson Charles, Borgland, Grove Borgland & Charles21 LAT31x LAT ACD LPT None Charles, Borgland, Grove Borgland & Charles22 LAT40x LAT CAL CPT Bright, Nelson, Grove Borgland, Grove Borgland & Grove23 LAT41x LAT CAL LPT None Borgland, Grove Borgland & Grove24 LAT50x LAT TKR CPT Bright, Nelson, Tajima Borgland, Grove, Tajima Borgland & Tajima25 LAT51x LAT TKR LPT None Borgland, Grove, Tajima Borgland & Tajima26 LAT521 LAT Config 1 Light Tight Test Grove Charles, Borgland, Tajima Borgland, Charles, Grove, & Tajima27 LAT651 T&DF False Triggers None G. Thayer Hart28 LAT661 T&DF Data Transport Errors Grove Grove, Hart Hart29 LAT70x LAT SVAC Flight Config on Gnd Ritz Borgland, Ritz Borgland30 LAT711 LAT SVAC Muon Calibration Ritz Borgland, Ritz Borgland31 LAT801 LAT SVAC Condition Scan (27 V) Ritz Borgland, Ritz Borgland32 LAT811 LAT SVAC Condition Scan (29 V) Ritz Borgland, Ritz Borgland33 LAT821 LAT SVAC Nominal Rate CR Test Ritz Borgland, Ritz Borgland34 LAT831 LAT SVAC Nominal Rate CR Data Volume Test Ritz Borgland, Ritz Borgland35 LAT841 LAT SVAC Nom Rate Condition Scan CR Test Ritz Borgland, Ritz Borgland36 LAT85x LAT SVAC Nom Rate Condition Scan CR Test Baun, Ritz Baun, Ritz, Borgland Borgland

Bold = Preferred reviewer(s)

Item Test Case ID

Test Case Name Requirement Owners Expert Reviewers Must Review all runs to evaluate Performance Data

GLAST Large Area Telescope

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