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82 The PCB Magazine • April 2017 and has been adopted in DoD policy and uti- lized by Program Offices as needed based on CPI. The scope of the trust definition was modi- fied to better suit the PrCB supply chain. The PrCB supply chain is less affected by classified information and more impacted by controlled unclassified information. Trust as defined in the scope of the PrCB accreditation, consists of four elements, quality, supply chain management, CoC, and access controls. The requirements for trust accredited PrCB sources starts in the DoD Program Office as il- lustrated in decision tree shown in Figure 1. Classification is determined once a decision is made that a PrCB is CPI. CPI is the output of the criticality analysis initially performed at a high level by the Program Office early in the product development phase. As the product de- sign becomes more mature, and as the program progresses into engineering and manufactur- ing phases, the maintenance of the criticality analysis and assignment of CPI may transition to the contractor. To mitigate the burden of additional require- ments being imposed on the supply chain, ef- forts were made to utilize pre-existing standards and certifications as much as possible to satisfy the requirement. The accreditation process pro- vides all major roles in the PrCB supply chain from PrCB layout design, to bare PrCB manu- facturing, through PrCB assembly. The general accreditation flow is common to all roles, but each role may be affected by different require- ments as it relates to the four trust elements. EXECUTIVE AGENT FOR PCB AND ELECTRONIC INTERCONNECT TECHNOLOGY PRCB TRUST ACCREDITATION Figure 1: Decision Tree for implementation of Formal Trust Accreditation.