This article proposes a new method for evaluating Product/Service System (PSS). It improves formulation of an evaluation step within an existing comprehensive method for designing PSS. The evaluation is achieved based on the importance of various customer value and each offering’s contribution to the value as well as the customer's budget. Its advantage is the effective utilization of design information accumulated at the earlier part of the comprehensive method, as opposed to marketing oriented methods solely for utility measurement (e.g. conjoint analysis). Application of the entire method to a real life case at an investment machine manufacturer is presented.