Covers the essential features of a comprehensive dependability programme for the planning, organization, direction and control of resources to produce products which will be reliable and maintainable. Is concerned with what has to be done, and why, and when and how it has to be done, but is not specific about who should do it and where. Applies to hardware and/or software products, where dependability characteristics are significant during the operation and maintenance phase. The requirements are aimed primarily at controlling influences on dependability at all product life-cycle phases from product planning to operation.