As discussed in Chapter 1, VVT engineers often use the term “testing” colloquially to mean VVT. But, in a narrower sense, following the VVT definition, testing is a subset of verification and validation, dealing with actively operating the system and verifying or validating it. The term nontesting refers to all the VVT activities which are not specifically testing per se. Accordingly, this chapter describes system nontesting VVT methods in the narrow sense. The chapter is divided into three parts: (1) prepare VVT products, (2) perform VVT activities and (3) participate in reviews. Each part describes nontesting VVT methods characteristic of the relevant group.