Development programs and model philosophy Preliminary design program

Development programs and model philosophy Preliminary design program Preliminary design review Prototype program Critical design review Qualification program Qualification review Flight program Flight acceptance review Development programs and model philosophy 1

Preliminary design ( system design, architectural design) PDR Established at PDR: • Design choices, trade-offs • Internal and external interfaces frozen • Internal and external environment • Functions and performances • Design & performance verification program • Feasibility of critical items • EGSE and test-equipment planning Start prototype program Development programs and model philosophy 2

Critical design review CDR Revisit PDR more accurately Documentation: • Specification, ICD, drawings • User manuals • Plans: AIV, test equipment, qualification, verification control etc FM-design ready Start qualification program Development programs and model philosophy 3

Qualification review QR Established at QR: • Functions and performances verified • Manufacturing / workmanship verified for launch and space environment Development programs and model philosophy 4

Acceptance review AR Established at Flight acceptance review: • Functions and performances verified • Manufacturing / workmanship verified for acceptance • Instrument characterization and calibration Development programs and model philosophy 5

Development programs and highlights Specifications frozen Interfaces frozen Environment known Trade-offs made PDR prototype ICDs, specs, User manuals Verification control matrix Plans CDR Functions, performance verified workmanship tested at Qualificationlevel qualification QR flight AR Functions, performance verified workmanship tested at acceptance level Instrument calibrated, characterized Development programs and model philosophy 6

Concurrent programs for all units Unit #3 Unit #2 Unit #1 prototype qualification flight Development programs and model philosophy 7

Shortcut to proto-flight model Specifications frozen Interfaces frozen Environment known Trade-offs made ICDs, specs, User manuals Verification control matrix Plans CDR Functions, performance verified workmanship tested at Qualificationlevel protoflight AR Functions, performance verified workmanship tested at acceptance level Instrument calibrated, characterized Development programs and model philosophy 8

EM QM FM STM remark 1. 1. 1 Detector subsystem hardware 1. 1 IDC 1. 1. 1. 2 cryostat 1. 1. 1. 2. 1 FEA 1. 1. 1. 2. 2 ADR 1. 1. 1. 2. 3 ST 1. 1. 1. 2. 4 ST/JT 1. 1. 1. 3 AAC 1. 1. 1. 4 CDE 1. 1. 1. 5 PSU 1. 1. 1. 6 radiator 1. 1. 1. 7 calorimeter array 1. 1. 1. 8 in-flight calibration source 1. 1. 1. 9 CAP 1. 10 CDP 1. 11 flight harness 1. 1. 2 Detector subsystem software 1. 1. 2. 1 IDC-software 1. 1. 2. 2 CDP-software 1. 1. 2. 3 cmd/hk database Development programs and model philosophy 9

EM QM FM STM remark 1. 2. 1 Telescope subsystem hardware 1. 2. 1. 1 Tube 1. 2 Mirror module 1. 2. 1. 3 Cover 1. 2. 1. 4 tac 1. 2. 1. 5 Heaters 1. 2. 1. 6 thermistors 1. 2. 1. 7 flight harness 1. 2. 2 telescope subsystem software 1. 2. 2. 1 cmd/hk database Development programs and model philosophy 10