An aim of this study is to define roles and structures of inspections about a security of building performance. We have researched different 3 systems, by public service, or private service with insurance, or both existing together. We understand that inspection has two steps: to discover blind information about performance by plan check, and checking or observations under construction and occupancy, and to judge of performance by referring codes. And we can explain when materials or equipment are inspected, by difference of secular change of reliability of them. And each community secures the independence of inspectors from owners or building constructor, to judge fairly by its own system.
