BS 5760-20:1997 Reliability of Systems, Equipment and Components - Guide to the specification of dependability requirements

This section of IEC 300 gives guidance on specifying required dependability characteristics in product and equipment specifications, together with specifications of procedures and criteria for verification.
The guidance provided includes the following:
— advice on specifying quantitative and qualitative reliability, maintainability and availability requirements;
— advice to customers of a product to help them to ensure that the specified requirements will be fulfilled by suppliers;
— advice to suppliers to help them to meet customer requirements.