Titlebook: Reliability and Maintainability in Perspective; David J. Smith Textbook 1988Latest edition Macmillan Publishers Limited 1988 Liability.mai

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How Important are Reliability and Maintainability?red of the failures of their age. If, however, we concentrate on the success and seek to identify which characteristics of design or construction have given them a life span and freedom from failure far in excess of many twentieth-century products, then two important considerations arise.

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Design Factors Influencing Down Timet and of the possible equipment failure modes. He must understand that production difficulties all too often become field problems since, if assembly is difficult, maintenance will be well nigh impossible. Achieving acceptable repair times involves facilitating diagnosis and repair. The main design parameters are as follows.

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Reliability Analysis and Failure Mechanisms group of devices. A failure is assumed to be the result of stress exceeding strength. The average strength of the group of devices will increase during the early failures period owing to the elimination, from the population, of the weaker items.

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Making Use of Field Feedbackailure reporting system should be established for every project and product. Customer co-operation with a reporting system is essential if feedback from the field is required and this could well be sought, at the contract stage, in return for some other concession.

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Maintenance Handbooksainability depend, to a large degree, on the maintenance instructions. The design team, or the maintainability engineer, has to supply information to the handbook writer and to collaborate with him if the instructions are to be effective.

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Design and Assurance For Reliability to the many failure possibilities arising from manufacture and subsequent use. This chapter outlines the activities and techniques which can be applied in design, to develop equipment to meet the R and M objectives and to minimise failures in manufacture and use.