Manufacturing Project Portfolio & Capex worked example

Portfolio Capacity at 99% expected uptime: a worked example

Push expected uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when portfolio capacity in manufacturing project portfolio and capex is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Units produced per production cycle: 4 units / cycle (unchanged)
  • Available production cycles in the period: 480 cycles (unchanged)
  • Expected uptime (availability): 99 % (raised for this scenario; the documented default is 90)
  • Expected first-pass yield: 97 % (unchanged)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where expected 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 (sellable) capacity by discounting gross throughput for expected downtime and first-pass yield losses. 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 portfolio capacity: 1,844 units (headline result)
  • Gross portfolio capacity: 1,920 units
  • Portfolio capacity downtime loss: 19.2 units
  • Portfolio capacity yield loss: 57.02 units

Run it with your numbers

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

Last reviewed 2026-05-12.