Roofing, Siding & Exterior Building Products worked example

Line Speed Capacity at 65% roll-former uptime: a worked example

This worked example runs the line speed capacity numbers for a tougher week than the baseline: 65% roll-former uptime instead of the typical 90%. Estimate line speed capacity for roofing, siding and exterior building products using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.

The inputs for this scenario

  • Panels formed per press cycle: 4 units / cycle (held at the documented default)
  • Available press cycles in the shift: 480 cycles (held at the documented default)
  • Roll-former uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass panel yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross line speed capacity = line speed capacity output per cycle × available line speed capacity cycles.
  • Good line speed capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross line speed capacity works out to 1,920 units at these inputs.
  • Line speed capacity downtime loss works out to 672 units at these inputs.
  • Line speed capacity yield loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where roll-former uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • Use it when setting shift targets, sizing a line against a demand number, or diagnosing why actual output trails the machine's rated speed. 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

  • Good line speed capacity: 1,211 units (headline result)
  • Gross line speed capacity: 1,920 units
  • Line speed capacity downtime loss: 672 units
  • Line speed capacity yield loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Line Speed Capacity calculator, set roll-former uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.