Composites, Fiberglass & Advanced Materials worked example

Composite Tool Life Cost at 72% share of tool cost scope included: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop share of tool cost scope included to 72%, then walk the calculation through step by step. Estimate cost assigned to composite molds or tools over their usable life.

The inputs for this scenario

  • Good tool pulls or parts planned over tool life: 1,200 parts (held at the documented default)
  • Tool-life cost per pull or part: 18 $ / part (held at the documented default)
  • Share of tool cost scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed tool maintenance and storage cost: 3,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable composite tool life cost = good tool pulls or parts planned × tool-life cost per pull or part × tool cost scope included.
  • total composite tool life cost works out to 18,752 $ at these inputs, and this is the headline figure for the scenario.
  • composite tool life cost per part or job works out to 15.63 $ / piece at these inputs.
  • variable composite tool life cost works out to 15,552 $ at these inputs.
  • fixed tool maintenance and storage cost works out to 3,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of tool cost scope included sits at 100% and the headline result is 24,800 $, this scenario comes in 24.39% below the baseline at 18,752 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to share of tool cost scope included, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats per-pull cost as constant, but real composite tools degrade non-linearly; early pulls are cheap and late pulls near end-of-life may need rework or coating that the flat rate understates.

Results at a glance

  • total composite tool life cost: 18,752 $ (headline result)
  • composite tool life cost per part or job: 15.63 $ / piece
  • variable composite tool life cost: 15,552 $
  • fixed tool maintenance and storage cost: 3,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Composite Tool Life Cost calculator, set share of tool cost scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.