activities. Each engineering and management discipline often pursues its own objectives independently, or at best, in coordination only with mainstream program activities such as design engineering and testing. To ensure that the SSP is comprehensive, the contractor must impose requirements on subcontractors and suppliers that are consistent with and contribute to the overall SSP. The SSPP must show the contractor's procedures for accomplishing this task. The prime contractor must evaluate variations and specify clear requirements tailored to the needs of the SSP. Occasionally, the PO procures subsystems or components under separate contracts to be integrated into the overall system. 

Subcontracted sub-systems that affect safety must be required to implement an SSP. If specified in the contract, the integration of these programs into the overall SSP is the responsibility of the prime contractor for the overall system. The prime contractor’s SSPP must indicate how the prime contractor plans to effect this integration and what procedures will be followed in the event of a conflict. 

