Value stream mapping
Value stream mapping is the Lean technique of drawing a current-state diagram of a process — every step, every queue, every handoff, with cycle time and wait time labelled — to identify where value is being added and where it's not. The output is typically a future-state map showing the eliminated waste.
VSM is a workshop technique, not a tool: a cross-functional team walks the actual process step by step, drawing it on a wall, capturing the data each step generates (cycle time, wait time, rework rate, defect rate). The output reveals the typical pattern: actual value-add work is 5-15% of total elapsed time; the rest is waiting, rework, and handoff overhead. The future-state map proposes a process with the largest waste eliminated. VSM works equally well for manufacturing and knowledge work; software-delivery VSM has produced some of the most cited Lean case studies.
Discussed in our use-cases
ICP-targeted pages where value stream mapping is part of the framing.
Related terms
- Value stream
A value stream is the end-to-end sequence of activities that delivers a product or feature to a customer.
- Flow efficiency
Flow efficiency is the ratio of value-add time to total elapsed time for a case — typically expressed as a percentage.
- Theory of constraints
Theory of constraints is Eli Goldratt's management methodology built on the observation that every system has one constraint (bottleneck) that limits its total throughput — and the only improvement that increases throughput is the one that elevates the constraint.