Purpose: Nowadays manufacturers companies are increasingly compelled to navigate towards servitization. Different methods and approaches were proposed in literature to support them to switch from traditional product-based business model to product service systems (PSSs). However, new knowledge, capabilities and skills were needed to consistently develop PSSs, since they need a joint focus on both customer’s perspective and company’s internal performance and at the same time a proper support for the integration of product and service design. The purpose of this paper is to propose the Product Service System Lean Design Methodology (PSSLDM), a structured methodology to develop PSSs along their entire lifecycle. Design/methodology/approach: Retrieving concepts from interpretative, interactive and system development research traditions, and strongly reminding the design research methodology framework, the adopted research methodology is composed of three main phases (observation and conceptualization, theory building and tool development, validation) and involved three heterogeneous companies. Findings: This paper provides an overview of the PSSLDM, explaining how the different methods supporting its conduction should contribute to properly design an integrated PSS. Moreover, companies highlighted several benefits in the different stages along the PSS lifecycle deriving by the adoption of the PSSLDM. Research limitations/implications: The development of a platform based on the PSSLDM methodology raises a discussion on the possible changes needed by current Product Lifecycle Management (PLM) models and systems when they have to do with PSSs. Originality/value: The PSSLDM enriches the already proposed SErvice Engineering Methodology, introducing new several components linked by lean rules in each of its phases (starting from customer analysis, going through solution concept and detailed design, until the offering analysis) and better supprting the deatil design of both prodcut and service components.

The paper proposes a model for assessing the maturity of new service development (NSD) processes in manufacturing companies that offer product-services. The model adopts a five-stage scale on which key elements are evaluated according to the following dimensions: (1) the approach used to manage processes and projects (2) the use of specific resources, skills and tools (3) the involvement of customers, suppliers and other stakeholders and (4) the adoption of performance management systems. An empirical application of the model was carried out based on an inter-company workshop and in-depth interviews. Such a model allows not only to describe the maturity of NSD processes of a company but also to identify the main gaps and to prioritize improvement actions.