Roofing, Siding & Exterior Building Products worked example

Installer Kit Quantity at 65% assembly line uptime: a worked example

This worked example runs the installer kit quantity numbers for a tougher week than the baseline: 65% assembly line uptime instead of the typical 90%. Estimate installer kit quantity 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

  • Kits assembled per production cycle: 4 units / cycle (held at the documented default)
  • Available assembly cycles: 480 cycles (held at the documented default)
  • Assembly line uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • Kit first-pass yield: 97 % (held at the documented default)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where assembly line 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 scheduling a kitting run or promising a kit quantity to a distributor or crew. 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 installer kit quantity capacity: 1,211 units (headline result)
  • Gross installer kit quantity capacity: 1,920 units
  • Installer kit quantity downtime loss: 672 units
  • Installer kit quantity yield loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Installer Kit Quantity calculator, set assembly line uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.