Learning to see without value stream maps

How a spaghetti diagram can help plot a more efficient layout

By Shahrukh Irani

A value stream is “all the actions (both value-added and nonvalue-added) currently required to bring a product through the main flows essential to every product,” (Learning To See: Value Stream Mapping to Create Value and Eliminate Muda, Mike Rother and John Shook, 2009). Value stream mapping (VSM) is “the process of mapping the material and information flows of all components and subassemblies to produce a value stream map.”


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