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D-11. Systems Engineering
Systems Engineering is an approach to translate approved operational needs and requirements into
operationally suitable blocks of systems. The approach consists of a top-down iterative process,
throughout the system life cycle, of requirement analysis, functional analysis and allocation, and
design synthesis and verification for maintainability, reliability, interoperability and survivability.
Evaluation Criteria
Milestone
B C FRP
• Has a Systems Engineering Plan (SEP) has been established and implemented X U U
1. Reliability, Availability and Maintainability (RAM)
• Logistics support factors are traceable to the following factors of the Design X U
Reference Mission Profile (DRMP):
o The environmental profile includes the system’s production, operation
and support environments with their associated timelines. The operating
and non-operating requirements may include temperature, vibration,
electromagnetic interference, electrostatic discharge, humidity, altitude,
salt spray, fog, nuclear, chemical and biological, sand/dust, foreign object
damage, production contaminants, etc.
o Functional profiles are prepared and detailed to the subsystem, assembly
and part levels as the system design progresses. They describe the system
functional requirements and their associated mission and life-cycle
timelines.
o Logistics-use profiles and associated timelines are prepared and updated X U U
over the life-cycle based on the system detail design and maintenance
plan. RAM measures (e.g., A o , Mean Time Between Failure [MTBF],
MRT and MDT) are defined in quantifiable and measurable terms.
• RAM/testability requirements are defined consistent with the ICD and flowed X
down to program documents and subcontractors as appropriate.
• The appropriate RAM/testability/logistics support design analyses/tests are X U
properly phased into the program.
• RAM/supportability design guidelines have been established. X
• RCM analysis and FMECA are used to identify failure modes, their frequency, X
their effects on performance and their criticality and are further used to develop
condition-based and schedule-based maintenance tasks.
• Have an Operational Safety, Suitability, and Effectiveness (OSS&E) baseline X
and plan been developed
• Predictions, analyses and test results support RAM requirements. X U
• A readiness model is used to assess the effects of various levels of redundancies, X U
spares, downtimes and maintenance concepts on operational availability.
• Has a Joint Reliability and Maintainability Evaluation Team (JRMET) been
established to collect and analyze data on R&M and supportability issues
X
Version 1: Jan 2006 74
Air Force Independent Logistics Assessment Handbook