This value stream map is a lean tool that uses a flowchart to document each process step. Many lean practitioners regard VSM as a critical tool for identifying waste, shortening process cycle times, and improving processes. A value stream map is a workplace efficiency tool that combines material processing steps with information flow and other relevant data. VSM is a critical lean tool for any organization that wants to plan, implement, and improve its lean journey. VSM assists users in developing a solid implementation strategy that will maximize their available resources and ensure that materials and time are used efficiently.