Interdisciplinary teamwork has become a fundamental, integrated and essential component of every project in value analysis/value management since decades. There is a well founded, tested and approved wealth of experience, which is available for team work even beyond the closer area of value analysis or value management. However, a team can only be optimally effective when it operates in a teamwork-suitable environment. Without the holistic implementation in a suitable full range of instruments, teamwork alone will not lead to the desired success. This VDI Guideline is universally applicable in all areas of economics, sciences and administration. It supports