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Title: Inspection policies for the detection of system failure
Author: Munford, Alan Gordon
ISNI:       0000 0001 3431 4647
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 1976
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This thesis is concerned with the problem of deciding when to inspect a system in order to detect a failure that would not otherwise be apparent. The first chapter includes a review of some of the inspection models that have appeared in the literature. A new linear cost model is then proposed, and the chapter ends with a discussion of optimality criteria. The second chapter is devoted entirely to 'optimal' inspection policies, i.e. those which minimise a certain cost function. The necessary theory is developed to deal with the new cost model proposed in Chapter 1. Some computational problems that arise in connection with the optimal policies motivate a study of suboptimal policies, and Chapter 3 is concerned with an investigation into the properties of periodic (regular) inspection policies. Chapters 4 and 5 introduce two heuristic inspection policies which are constructed so that the times between inspections are influenced by the mean residual life function in one case, and the hazard rate function in the other. This latter policy (designated x/p) has some attractive properties, and tables are given for computing the best x/p policy in the Weibull case. A sensitivity analysis of x/p policies is carried out in Chapter 6. In the last chapter some tables of expected cost in the Weibull case are presented for the 3 suboptimal policies. A comparison with the optimal policy reveals that the suboptimal policies are highly efficient in many cases.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available