Leather, Footwear & Accessories Manufacturing worked example

Material Substitution Margin at 57% target substitution rate: a worked example

Push target substitution rate up to 57% and the picture changes. This example computes every intermediate figure at that operating point. Use this when evaluating a switch from genuine leather to synthetic, comparing tannery quotes, considering a lower-cost outsole compound, or quantifying savings from a material engineering change.

The inputs for this scenario

  • SKUs with an approved material substitution: 18 SKUs (unchanged)
  • Total active SKUs in the range: 45 SKUs (unchanged)
  • Target substitution rate: 57 % (raised for this scenario; the documented default is 50)

Working through the calculation

  • Applying the documented formula (Substitution rate = SKUs with substitution / total active SKUs x 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 40 % for material substitution rate, the number this scenario is built around.
  • At this operating point the engine returns 17 points for gap to target substitution rate.
  • At this operating point the engine returns 18 count for skus with substitution.
  • At this operating point the engine returns 45 count for total active skus.

How this compares with the baseline

  • Against the tool's baseline example, where target substitution rate sits at 50% and the headline result is 40 %, this scenario lands almost exactly on the baseline at 40 %.
  • It computes the percentage of active SKUs running an approved material substitution and the points of gap between that rate and your target. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Material substitution rate: 40 % (headline result)
  • Gap to target substitution rate: 17 points
  • SKUs with substitution: 18 count
  • Total active SKUs: 45 count

Run it with your numbers

  • Every input above is editable in the live Material Substitution Margin calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.