ABSTRACT
This chapter explains the difference between verification and validation and how requirements validation differs from product validation. Traditionally, Systems Engineer has recognized four categories of verification: test, demonstration, analysis, and examination. A test is a type of verification which requires instrumentation. These tests can be, for example, pressure tests, wind tunnel tests, or flight tests. There is sometimes confusion between development tests and verification tests. Verification by simulation is a type of analysis using computers. Analysis by similarity is a frequently used method of verification. In the traditional world, verification of customer requirements is a most often neglected task. Verification takes place throughout the development process. Analyses and development tests done during the design process become the first steps in verification. Verification and system integration are inextricably linked. The manufacturer is required to develop and document a system integration plan in which the order of mating and testing is done.
