As motivating and including people is a crucial aspect in any planning, design and change process there is always a need for appropriate methods and tools to support this. Lego Serious Play (LSP) is such a method which was developed to facilitate among others communication, creativity and shared mental models. In this paper the application of LSP is demonstrated for the case of re-designing a product development lifecycle process. With the case study we pursue a qualitative approach to seek for support that LSP is able to support team building and team decision processes, to avoid typical pitfalls of groupthink which will finally lead to solutions of higher quality, to efficient processes and to satisfied participants.