NASA MSFC HDBK 3074:2002
NASA MSFC HDBK 3074:2002 Selection Methodology For Orbital Replaceable Units Provides guidance on selecting the appropriate ORU items to ensure that a flight system is supportable on-orbit.
Table of Contents
FOREWORD1.0SCOPE
2.0APPLICABLEDOCUMENTS
2.1ApplicableDocuments
2.2ReferenceDocuments
3.0ACRONYMSANDDEFINITIONS
3.1AcronymsandAbbreviations
3.2Definitions
4.0THENEEDFORANORUSELECTIONPROCESS
5.0EFFECTIVEORUSELECTIONISINTEGRALTOSUPPORTABILITY
ANDSYSTEMSENGINEERING
5.1SystemsEngineering
5.2SupportabilityEngineering
5.3ORUSelection
6.0ORUSELECTIONMETHODOLOGY
6.1Initialdata
6.1.1CollectthesystemRMSrequirements
6.1.2Identifythesystemarchitecture
6.1.3AllocatetheRMSrequirementstothesystem
architecture
6.1.4Identifythemaintenanceitems
6.1.5IdentifytheORUselectioncriteria
6.2InitiatetheORUselectionprocess/flowchart
6.3ReiteratetheORUselectionprocessasthesystem
definitionmatures
7.0ORUDESIGNCONSIDERATIONS
7.1Safety
7.2Reliability
7.3Humanfactors
7.3.1Accessibility
7.3.2Interfaces
7.3.3Restraints
7.3.4Handling
7.3.5Labeling
7.4Otherdesignconsiderations
7.4.1Specialtoolsorequipment
7.4.2Commonality
7.4.3Designpackaging
7.4.4Faultdetection,isolationandrecovery(FDIR)
7.4.5Maintenanceverification
7.4.6Repairlevelanalysis(RLA)
7.4.7Technicaldataanddocumentation(TDSUMMARY
AppendixA-ORUSelectionFlowchartLogic
AppendixB-ORUSelectionFlowchartLogicWorksheets