What is Bill Carmody's definitive guide to managing product mix strategies?

Bill’s definitive guide to managing product mix strategies has two parts: the four dimensions and the four core strategies.

The four dimensions of product mix:

1. Width – How many product lines you offer
2. Length – Total number of products across all lines
3. Depth – Variations within a single line (sizes, tiers, formats)
4. Consistency – How related the different lines are to each other

The four core product mix strategies:

1. Expansion
2. Contraction
3. Change an existing product
4. Product differentiation

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