MIL-HDBK-1390
5.7.2.2 TMRR phase. A LORA is generally applicable in this phase. In the TMRR phase, performance
characteristics of the system/equipment are more or less established. However, the actual design is still flexible.
Support, design, and operational alternatives are being investigated through tradeoff analysis. In this phase, a
LORA is an excellent method for performing these tradeoffs and influencing the design of the system/equipment.
When effectively timed and tailored, LORA assists in establishing the maintenance concept; assists in establishing
cost effective reliability requirements and allocating these system level requirements to lower indenture levels;
acquires essential information to enable a detailed source of repair analysis; and assists in establishing cost effective
testability requirements. A TMRR phase LORA is also conducted to identify items which should clearly be
designed for discard, instead of being designed for repair.
A
B
Technology Maturation and Risk Reduction Phase
System
Performance
System Design and Operational Alternatives
Specification
5.1
thru
CDD
5.4
6.1
thru
6.8
Initial Product Support Structure Outcomes:
7.1
·
Updated Product Support Analysis Strategy
7.2
14.1
·
Product Support Analysis Plan
7.3
·
Organic vs. Contractor Support Decisions
8.1
4.1
1.1
12.1
2.1
·
Identification of Maintenance Levels
thru
thru
To FIGURE 5
1.2
thru
From FIGURE 3
2.2
·
8.7
4.4
1.3
12.11
Corrective Maintenance Tasks
·
9.1
Preventive Maintenance Tasks
16.1
·
thru
Servicing
16.2
9.10
·
Support Equipment Calibration
17.1
thru
TA-STD-0017,
10.1
17.5
Activity 11.7
thru
Level of Repair
10.5
Analysis
11.1
thru
11.13
FIGURE 4. LORA requirement identified in the conventional PSA process flow for TMRR phase
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