MIL-HDBK-1390
5.7.2.1 MSA phase. A LORA in the MSA phase is selectively applicable and requires tailoring. The design is
only conceptual, but this phase allows the best opportunity for identifying alternatives, conducting tradeoffs, and
influencing the design from a supportability standpoint. Since the design is conceptual, the extent of the LORA
conducted in this phase depends primarily on the availability of data. An MSA phase LORA is usually conducted to
establish a preliminary maintenance concept based upon engineering studies, evaluations, historical data, and expert
opinion. While an MSA phase LORA only analyzes general concepts, it establishes the foundation for future LORA
efforts by providing the basis for documenting economic and noneconomic evaluations on similar systems which
must be reviewed against the conceptual system and helps develop the constraints on the LORA in the TMRR phase.
A
MDD
Pre MDD
Materiel Solution Analysis Phase
Mission and Support System Concepts
User
5.1
Needs
Materiel Solution Outcomes:
thru
5.4
·
Requirements Analysis
·
Technology Opportunities
& Resources
6.1
·
Standardization Rqmts
thru
CBA
6.8
Sustainment Metrics for:
AO AM RM O&S DT
7.1
7.2
7.3
Supportability Design
4.1
1.1
8.1
Requirement Constraints for:
ICD
To FIGURE 4
thru
1.2
thru
·
Reliability
4.4
1.3
8.6
·
Availability
9.1
·
Maintainability
thru
·
Environmental
9.10
·
Cost/Affordability
17.1
TA-STD-0017,
10.1
Activity 11.7
Analysis of
thru
Level of Repair
Alternatives
10.5
Analysis
·
Product Support Analysis
11.1
Strategy
·
thru
Maintenance Concept
11.13
FIGURE 3. LORA requirement identified in the conventional PSA process flow for Pre MDD and MSA phases
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