An extension towards service provision takes place in manufacturing industry. Inclusion of softer service aspects indicates that the common view on knowledge management to control and monitor a technical process have limitations. Sharing expertise is an additional way of managing knowledge particularly with the intentions to make experience based knowledge organizational available. By studying product developers’ daily work, especially how they perceive that they apply and share knowledge, we problematize knowledge activities in product-service development to discuss the established knowledge management activities. The paper suggests some considerations to support the development of a knowledge base for product-service design.