Well H. Harry there are different types of testing with different missions.
DoD employs three formal types of T&E (directed by statute) in the acquisition of systems administered by OSD: Developmental Test & Evaluation (DT&E), Operational Test & Evaluation (OT&E) and Live Fire Test and Evaluation (LFT&E). DT&E verifies that the system’s design is satisfactory and that all technical specifications and contract requirements have been met. Sometimes called Technical Testing, DT&E is sponsored by the program office and can be conducted by the government, by the contractor, or may be a mix of both. Most early DT&E in a program will likely be done at the contractor’s facilities under controlled, laboratory conditions. Later in the program DT&E is often conducted at government test facilities by government or combined government and contractor test teams. OT&E follows DT&E and validates that the system under test can effectively execute its mission in a realistic operational environment when operated by typical operators against representative threats. The difference between DT&E and OT&E is that DT&E verifies that the system is built correctly in accordance with the specification and contract, and OT&E validates that the system can successfully accomplish its mission is a realistic operational environment. LFT&E combines with both DT&E and OT&E to assess the vulnerability and/or lethality of a system before it is approved for full-rate production.
Hence the Director of Operational Test and Evaluation (DOT&E) report contained a lot of not so flattering things to say about the F-35. I sure don't see much "bought and paid for" in that test report.