Probably the most convincing demonstration of reliability is the systematic production of items (systems or devices) which are recognised by their users to be highly reliable. Rolls Royce cars have an enviable reputation which has been established over a number of years. The reliability of a well-established product may be demonstrated by analysis of past failure data. The reliability of new products, however, must either be accepted on trust or demonstrated by the manufacturer. Section 18.2 briefly surveys how system failure data may be analysed. Section 18.3 onwards is concerned with Demonstration testing.
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