Technical Performance Measurement TPM

Technical performance measurement plays a prominent role in Military Standard 499B. Exhibit 9.4 lists some of the TPM references in that standard.

Exhibit 9.4: Selected TPM References in Mil-Std-499B

Section 4.6.8. Technical Performance Measurement (TPM). The contractor shall establish and implement TPM to evaluate the adequacy of architectures and designs as they evolve to satisfy the requirements and objectives selected for tracking. TPM shall be used to identify deficiencies that jeopardize the ability of the system to meet a performance requirement. Actions taken due to deficiencies are dependent on whether the technical parameter is a requirement or an objective. The level of detail and documentation shall be commensurate with the impact on cost, schedule, and performance of the technical program.

Section 4.6.8.1. Implementation of TPM. The contractor shall track the achievement to date for each technical parameter as the analyses, design and development activity progresses. In the event that the achievement to date value falls outside the tolerance band, the variation shall be determined by comparing the achievement to date against the corresponding value on the planned value profile. In the event progress in the technical effort supports identification of a different current estimate than previously predicted, a new profile and current estimate shall be developed. The current estimate shall be determined from the achievement to date and the remaining schedule and budget. Risk assessments and analysis shall be updated to reflect changes in the TPM profiles and current estimates, and impacts on related parameters.

Section 4.6.8.2. TPM on Requirements. For identified deficiencies, analyses shall be performed to determine the cause(s) and to assess the impact on higher level parameters, interface requirements, and system cost effectiveness. Alternative recovery plans shall be developed with cost, schedule, performance, and risk impacts fully explored. For performance in excess of requirements, the marginal cost benefit of the performance delta and opportunities for reallocation of requirements and resources shall be assessed and an appropriate course of action implemented.

Section 4.6.8.3. TPM on Objectives or Decision Criteria. The contractor shall perform TPM on objectives and decision criteria as contained in their SEMP (systems engineering management plan)

In general, TPMs are the key measures of technical performance of the system, as previously illustrated in Chapter 7 (Section 7.3.7). They allow the systems engineering team to carry out the evaluation ratings shown in Table 9.2. They deal with technical factors of the system and should be measurable in a technical sense. Their measurement may be exceedingly complex, requiring detailed modeling and simulation to compute the values of TPMs. TPMs, in general, depend on a series of other parameters known as technical performance parameters (TPPs). A method for relating TPPs to TPMs, developed by this author, is Parameter Dependency Diagramming (PDD) [9.9]. The PDD procedure is illustrated in Section 9.8.

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