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Ai Inherent Availability
Ao Operational Availability
AoA Analysis of Alternatives / Angle of Attack
AFMETCAL Air Force Metrology and Calibration Program
ALT Accelerated Life Testing
ARC Air Reserve Component
APB Acquisition Program Baseline
API Application Program Interface
ASTR Accelerated Stress Testing and Reliability
ATE Automatic Test Equipment
ATML Automated Test Markup Language
BCS Baseline Comparison System
BIST Built-In Self-Test
BIT Built-In Test
BITE Built-In Test Equipment
BIT/FD Built-In-Test Fault Detection
CA Criticality Analysis
CALS Continuous Acquisition and Life-Cycle Support
CBIT Continuous Built-In Test
CBM/CBMA Condition-Based Maintenance or Condition-Based Monitoring
CBM+ Condition-Based Maintenance Plus (Enhanced by DoD Directives)
CCA Common Cause Analysis / Circuit Card Assembly
CDR Critical Design Review
CFE Contractor Furnished Equipment or Customer Furnished Equipment
CFI Critical Faults Identified
CIF Critical Importance Factor
CM Corrective Maintenance / Condition Monitoring / Configuration Management
CMMS Computer Maintenance Management System
CMRS Calibration and Measurement Requirements Summary
CND Can Not Duplicate
CPI Cost Performance Index
COMR Communications Reliability
CONOPS Concept of Operations
COTS Commercial Off-the-Shelf
CPIN Computer Program Identification Number
DO Operational Dependability
DE Diagnostic Engineering
DFD Design for Diagnosability
DFI Desktop Fault Insertion
DFMAT Design for Manufacturability & Test
DFT Design for Test (some also refer to this as Design for Testability)
DFT Dynamic Fault Tree
DIF Diagnostic Importance Factor
DiagML Diagnostic Modeling Language
DISN Defense Information Switch Network
DOC Designated Operational Capability
DoD United States Department of Defense
DPHM Diagnostics, Prognostics & Health Management
DRMP Design Reference Mission Profile
DT&E Developmental Test and Evaluation
ESRT Essential System Repair Time
EC Enterprise Commander
ECN Engineering Control Number
ECP Engineering Change Proposal
ECR Engineering Change Request
ECRB Engineering Change Review Board
ERB Engineering Review Board
ESS Environmental Stress Screening
FA False Alarm
FAP Functional Area Plan
FAR False Alarm Rate / Federal Aviation Regulation
FAT Functional Acceptance Test / File Allocation Table
FD Fault Detection
FD/FI Fault Detection & Fault Isolation
FDI Fault Detection & Fault Isolation
FDR Final Design Review
FHA Functional Hazard Analysis
FI Fault Isolation
FIT Factory Integration & Test
FMC Fully Mission Capable
FFMEA Functional Failure Mode Effects Analysis
FMEA Failure Mode Effects Analysis
FMECA Failure Mode Effects and Criticality Analysis
FMEDA Failure Mode Effects and Diagnostic Analysis
FOM Figure of Merit
FR Fault Resolution
FRACAS Failure Reporting and Corrective Action System
FSA False System Aborts
FSL Full System List
FTA Fault Tree Analysis
FTE Factory Test Equipment
FUI Failures Uniquely Isolated
GFE Government Furnished Equipment
GFP Government Furnished Property
GIDEP Government-Industry Data Exchange Program
HA Hazard Analysis
HALT Highly Accelerated Life Testing
HASS Highly Accelerated Stress Screen
HM Health Management
HRA Hazardous Risk Analysis
IBIT Initiated Built-In Test
ICBM Intercontinental Ballistic Missile
ID Integrated Diagnostics
IETM Interactive Electronic Technical Manual
IFR In-flight Reliability
ILS Integrated Logistics Support
IMPACTS Integrated Manpower, Personnel, and Comprehensive Training and Safety
INCOSE International Council on Systems Engineering
IoT Internet of Things
IRAD Independent Research and Development
IRSP In-Place Readiness Spares
ISDD Integrated System Diagnostic Design
ISHM Integrated System Health Management
ISO International Standards Organization
IT&E Integration, Test and Evaluation
IVHM Integrated Vehicle Health Management
JCALS Joint Computer-Aided Acquisition and Logistics Support
JPA Job Performance Aid
JTAG Joint Test Action Group
KPI Key Performance Indicator
KPM Key Performance Metric
KPP Key Performance Parameter
LCC Life Cycle Cost
LCCA Life Cycle Cost Analysis
LCN Logistics Control Number
LOC Lines of Code
LORA Level Of Repair Analysis
LR Launch Reliability
LRM Line Replaceable Module
LRU Line Replaceable Unit
LSA Logistics Support Analysis
MAJCO Major Command
MAP Mission Area Plan
MBE Model Based Engineering
MBIT Maintenance Built-in Test
MBR Model Based Reasoner
MBSE Model Based System Engineering
MC Mission Capable
MCMT Mean Corrective Maintenance Time
MCTI Mean Cost To Isolate
MCTR Mean Cost To Repair / Mean Cost To Replace
MDT Mean Downtime
MEFL Mission Essential Functions List
MESL Minimum-Essential Subsystem List
MLH/AH Maintenance Labor Hours per Active Hour
MMH/FH Maintenance Man-Hours per Flying Hour
MMH/LU Maintenance Man-Hours per Life Unit
MMH/PH Maintenance Man-Hours per Possessed Hours
MMT Mean Maintenance Time
MMY/L Maintenance Man Years per Launch
MNS Mission Needs Statement
MP Mission Profile
MP/U Maintenance Personnel per Operational Unit
MOTS Modified Off-the-Shelf / Modifiable Off-the-Shelf / Military Off-the-Shelf
MR Maintenance Ratio
MRS Mobility Requirements Study
MRSP Mobility Readiness Spares Package
MRT Mean Repair Time
MSMT Mean Scheduled Maintenance Time
MTBCF Mean Time Between Critical Failure
MTBDE Mean Time Between Downing Event
MTBF Mean Time Between Failures
MTBFA Mean Time Between False Alarms
MTBM Mean Time Between Maintenance
MTBMA Mean Time Between Maintenance Actions
MTBPM Mean Time Between Preventative Maintenance
MTBSA Mean Time Between System Aborts
MTBR Mean Time Between Removal
MTBUM Mean Time Between Unscheduled Maintenance
MTBSM Mean Time Between Scheduled Maintenance
MTD Maintenance Training Device
MTTF Mean Time to Failure
MTTI Mean Time to Isolate
MTTR Mean Time to Repair / Mean Time to Replace
MTTRF Mean Time to Restore Function
MTTRS Mean Time to Restore System
NFF No Fault Found
NMC Not Mission Capable
NMCB Not Mission Capable Both
NMCM Not Mission Capable Maintenance
NMCMU Not Mission Capable Maintenance Unscheduled
NMCS Not Mission Capable Supply
NOTS NATO Off-the-Shelf
O&M Operations and Maintenance
O&S Operating & Support
OM Opportunistic Maintenance
OMS Operational Mission Summary
ORD Operational Requirements Document
OT&E Operational Test and Evaluation
PBL Performance Based Logistics
PCB Printed Circuit Board
PdM Predictive Maintenance
PoF Probability of Failure / Physics of Failure
PRA Probabilistic Risk Assessment
PBRA Probabilistic-Based Risk Assessment
PDR Preliminary Design Review
PH Possessed Hours
PHA Preliminary Hazard Analysis
PHM Prognostic Health Management
PHS&T Packaging, Handling, Storage and Transportation
PM Preventive Maintenance
PMA Portable Maintenance Aid
PMC Partially Mission Capable
PMEL Precision Measurement Equipment Laboratory
PMFL Performance Monitoring and Fault Localization
PMP Planned Maintenance Percentage
POST Power On Self-Test
PSA Probabilistic Safety Assessment
PSMP Product Support Management Plan
Q Unreliability / Probability of Failure (PoF)
R Reliability / Probability of Success
R&M Reliability & Maintainability
RAA Required Asset Availability
RAM Reliability, Availability, and Maintainability
RAMS Reliability, Availability, Maintainability, and Supportability
RAMT Reliability, Availability, Maintainability, and Testability
RAW Risk Achievement Worth
RBD Reliability Block Diagram
RBM Risk Based Maintenance
RCA Root Cause Analysis
RCCA Root Cause Corrective Action
RCM Reliability-Centered Maintenance
RDGT Reliability Demonstration and Growth Test
RE Responsible Engineer
REA Responsible Engineering Authority
RIF Risk Increase Factor
RMA Reliability, Maintainability, and Availability
RM&D Reliability, Maintainability, and Deployability
RPN Risk Priority Number
RSP Readiness Spares Package
RTAT Run-Time Authoring Tool
R&D Research and Development
R&R Remove and Replace
Rm Mission Reliability
RRW Risk Reduction Worth
RSR Re-Entry System Reliability
RTF Run To Failure
RTOC Reduction Total Ownership Costs
RTOK Retest OK
SA System Aborts
SAR Strategic Alert Reliability / Software Anomaly Report / Safety Assessment Report
SCN Specification Change Notice
SDT Signal Detection Theory
SE Support Equipment / System Engineering / Specialty Engineering
SFE Supplier Furnished Equipment
SGML Standard Generalized Markup Language
SHM System Health Management
SIL Software Integration Lab
SLA Service Level Agreement
SLOC Software Lines of Code
SM Single Manager
SME Subject Matter Expert
SORAP Source of Repair Assignment Process
SOW Statement of Work
SPF Single Point Failure
SPFM Single Point Failure Mode
SPI Schedule Performance Index
SRA Shop Replaceable Assembly
SRS Software Requirement Specification
SRR System Requirements Review
SRU Shop Replaceable Unit
SSPP System Safety Program Plan
STE Support Test Equipment / Special Test Equipment
STT Strategy-To-Task
SYSML System Modeling Language
T&E Test and Evaluation
TCTO Time Compliance Technical Order
TIM Technical Interchange Meeting
TO Technical Order
TPM Total Productive Maintenance or Technical Performance Metrics
TPS Test Program Set
TPSS Test Program Set Specification
TRD Test Requirements Document
UAS Unmanned Aircraft System
UAV Unmanned Air Vehicle
UML Unified Modeling Language
UTE Utilization Rate
UR Utilization Rate (as used in formulas)
UTR Uptime Ratio
UUT Unit Under Test
VHM Vehicle Health Management
V&V Verification and Validation
WRA Weapon Replaceable Assembly
WSR Weapon System Reliability
WUC Work Unit Code
XMI XML Meta-data Interchange format
XML eXtensible Markup Language
XSL eXtensible Stylesheet Language

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