Inspecting artifacts goes well beyond simple code inspections and can make a huge difference in software quality and reduce time to market. Without inspections defect removal rates are less than 80%, with inspections it can rise to 97%. Few companies do inspections and fewer do them properly. Why artifact (use case, UML, code, test case, etc) inspection is not optional if you want to build quality software systems. This article uses physical engineering disasters to explain their software equivalents.