Wire Drawing & Rod Processing worked example

Capstan Utilization at 68% target capstan utilization: a worked example

This worked example runs the capstan utilization numbers for a tougher week than the baseline: 68% target capstan utilization instead of the typical 95%. Capstan Utilization measures how much of a drawing capstan's available time is spent actually pulling wire versus sitting idle for threading, die changes, break recovery or waiting on upstream rod.

The inputs for this scenario

Capstan running time (productive): 8 units (held at the documented default)
Total capstan available time: 250 units (held at the documented default)
Target capstan utilization: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

The calculation starts from the formula this tool documents: Capstan Utilization rate = affected amount ÷ total amount.
Rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
Gap to target works out to 64.8 points at these inputs.
Affected count works out to 8 count at these inputs.
Total count works out to 250 count at these inputs.

How this compares with the baseline

Against the tool's baseline example, where target capstan utilization sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
Use it to find the pacing capstan on a line, justify staffing or flow changes, or track whether reliability work is lifting real running time. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

Rate: 3.2 % (headline result)
Gap to target: 64.8 points
Affected count: 8 count
Total count: 250 count

Run it with your numbers

To rerun this with your own numbers, open the live Capstan Utilization calculator, set target capstan utilization to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.