DIN ISO 9001:1990-05

Gives quality system requirements used when a contract between two parties requires the demonstration of a supplier's capability to design and supply product. These requirements are aimed primarily at preventing nonconformity at all stages from design through to servicing. The standard applies in certain contractural situations; confidence in product conformance can be attained by adequate demonstration of certain supplier's capabilities (in design, development, production, installation and servicing) and the contract specifically requires design effort and the product requirements are stated principally in performance terms or they need to be established.