Supplier audit Supplier audit P, D, C, A model under a clear - minded state to ensure supply chain and product quality This article first describes how sunny weather brings a pleasant mood, and in this state of mind, sorts out the matters related to supplier audits... Determine the subsequent measuresSet an improvement deadline Three stages of career paths from craftsmanship to users achieve three levels of leap - forward improvement in supply - chain quality awareness. During one year as a PE in a small Taiwanese PCB factory... Supplier hierarchical management systemThe system manages quality