This chapter treats quantitative instruments to measure input to and output from innovation processes at the micro or firm level of service innovation processes. The aim is to develop a tool that can be used by service firms. It is not sufficient to develop a theoretical instrument; service firms should also use the measure if we are to get a valid measure and service firms are to get a useable decision tool. The chapter presents research that theoretically develops an appropriate measurement instrument and tests whether service firms would be likely to use it. The test is carried out in two steps: a long-term discussion in a group of service innovation managers, followed by exploratory experiments in two service firms. The conclusion presents a suggestion for a measurement model.