Roofing, Siding & Exterior Building Products worked example

Installer Kit Quantity at 99% assembly line uptime: a worked example

Push assembly line uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when installer kit quantity in roofing, siding and exterior building products is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Kits assembled per production cycle: 4 units / cycle (unchanged)
  • Available assembly cycles: 480 cycles (unchanged)
  • Assembly line uptime: 99 % (raised for this scenario; the documented default is 90)
  • Kit first-pass yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross installer kit quantity capacity = installer kit quantity output per cycle × available installer kit quantity cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good installer kit quantity capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross installer kit quantity capacity.
  • At this operating point the engine returns 19.2 units for installer kit quantity downtime loss.
  • At this operating point the engine returns 57.02 units for installer kit quantity yield loss.

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 10% above the baseline at 1,844 units.
  • It computes good kit capacity by discounting gross capacity for both assembly uptime and first-pass yield. 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

  • Good installer kit quantity capacity: 1,844 units (headline result)
  • Gross installer kit quantity capacity: 1,920 units
  • Installer kit quantity downtime loss: 19.2 units
  • Installer kit quantity yield loss: 57.02 units

Run it with your numbers

  • Every input above is editable in the live Installer Kit Quantity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.