ISO 21247:2005 provides a set of accept-zero sampling systems and procedures for planning and conducting inspections to assess quality and conformance to specified requirements. In addition, ISO 21247:2005 provides requirements for alternative acceptance methods proposed by the supplier. Such alternative methods would be based upon establishing and implementing an internal prevention-based quality management system as a means of ensuring that all products conform to requirements specified by the contract and associated specifications and standards. ISO 21247:2005, when cited in contract, is applicable to the supplier and extends to subcontractors or vendors. The quality plans are to be applied as specified in the contract documents, and deliverables may be submitted for acceptance if the requirements of ISO 21247:2005 have been met. Sampling systems and procedures in ISO 21247:2005 are applicable, when appropriate, to assess conformance to requirements of end items; components or basic materials; operations or services; materials in process; supplies in storage; maintenance operations; data or records; administrative procedures The sampling systems and procedures of ISO 21247:2005 are not intended for use with destructive tests or where product screening is not feasible or desirable. In such cases, the sampling systems to be used will be specified in the contract or product specifications.