Support Requirements for Opportunistic Replacement and Inspection Policies.

by John McCall


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A continuation of Project RAND research in the area of preferred maintenance policies. This Memorandum provides a method by which inventory and maintenance managers can predict the number of parts consumed per unit time and the number of maintenance actions per unit time when opportunistic maintenance policies are adopted. To illustrate, an opportunistic replacement policy is applied to a hypothetical ballistic missile whose structure is similar to that of the Minuteman Missile. The study computes several support requirements (e.g., the expected number of replacements of the rocket engines per unit time) and exhibits the sensitivity of these requirements to changes in the rocket-engine failure rate. It is indicated that changes in the rocket-engine failure rate have a substantial impact on some of the support requirements and no effect on others.

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