MAINTAINABILITY SPECIFICATION PARAMETERS AND THEIR RELATIONSHIPS.
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
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Study of specifications, current and proposed, general and specific, shows that maintainability is defined in many ways by M sub ct, sigma sub L, median or geometric mean, M max, fractile, total expected downtime during a period of time, availability, and by various combinations of these. While related in various ways, these diverse maintainability parameters are not in the least similar in meaning or ramification. This is not a disadvantage since different equipments do not have the same requirements and, therefore, depending on the requirement, some maintainability parameters are more appropriate than others. Disadvantages accrue, when for a particular mission requirement, inappropriate maintainability parameters or combinations of parameters are specified. It is the purpose of this report to analyze the use of various maintainability parameters or combinations of parameters as specification parameters and discuss their weaknesses and strengths. Author
- Operations Research