Product family matrix

A diagram created by Lean thinkers to identify product families. 

The illustration shows how a company that owns seven product lines from the customer's perspective placed its assembly steps and machinery at the top of a product family matrix. In this way, it quickly found a common pathway for products A, B and C, for which it then created a value stream map as a product family.

product family matrix
Source: Book Learning to See, Mike Rother and John Shook, page 6

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