Products and services are essential to an enterprise’s operations and hence they need to be designed, developed, and delivered in congruence with the enterprise’s business strategy and design. This paper investigates how to identify relevant aspects of products and services to be added to enterprise models by extending existing Enterprise Modeling (EM) languages for product/service modeling. The proposal is to decide on the relevance for EM based on “touch points”. The proposal is applied to extending the 4EM method with a Product/Service Model and is based on literature analysis in the area of product and service modeling and on an industrial case study.