Like any other design process, the design of haptic systems is largely influenced by the optimization of a technical system, which is based on the consideration of a large number of decisions about individual components that usually influence each other.

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In this chapter, the process of requirement definition is described, starting with the definition of the intended application together with the customer. Especially the derivation of technical parameters from the customers expectation and useful tools for this step are discussed. Further, the analysis of the intended interaction and the effects on the requirement identification are discussed. To alleviate the identification of requirements, main requirement groups are derived from the intended type of interaction and presented in five technical solution clusters. A review of relevant standards and guidelines on safety serves as another source of requirements of a haptic systems.

In this chapter, a number of measurement methods and tests are presented that can be used either for verification or validation or—sometimes—both. We therefore refrain from an ordering based on this steps, but will present the methods based on the focus of the evaluation method. In that sense one can identify three main foci of evaluation methods: system-centered methods that will test system properties (and are mostly used for verification, Sect. 13.1), task-centered methods that will test the task-performance of a user working with the haptic system (such tests are mainly used for validation but they can also verify system properties depending on the test design, Sect. 13.2) and user-centered methods that will measure the impact of the haptic system on the user. The latter are almost exclusively used for system validation and further described in Sect. 13.3.