Lean Value Stream Mapping (glossary)
Map all end-to-end linked tasks, control/decision nodes, and the interconnecting flows necessary to realize customer value. During the mapping process, eliminate all non-value added activities, minimize all necessary non-value activities, and enable the remaining activities to flow without rework, backflow, or stopping. (Oppenheim 2011)
Oppenheim, B.W., 2011. Lean for Systems Engineering With Lean Enablers for Systems Engineering. Hoboken, NJ, USA: J. Wiley & Sons, Pg 17, 20.