Manufacturing Cost Accounting & Finance worked example

Production Volume Variance at 99% expected equipment uptime: a worked example

Push expected equipment uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when production volume variance in manufacturing cost accounting and finance is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Good units produced per machine cycle: 4 units / cycle (unchanged)
  • Scheduled production cycles available: 480 cycles (unchanged)
  • Expected equipment uptime: 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 production volume variance capacity = production volume variance output per cycle × available production volume variance cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good production volume variance capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross production volume variance capacity.
  • At this operating point the engine returns 19.2 units for production volume variance downtime loss.
  • At this operating point the engine returns 57.02 units for production volume variance yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where expected equipment 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 (saleable) production capacity from output per cycle and available cycles, after applying expected uptime and first-pass yield, and isolates the downtime and 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 production volume variance capacity: 1,844 units (headline result)
  • Gross production volume variance capacity: 1,920 units
  • Production volume variance downtime loss: 19.2 units
  • Production volume variance yield loss: 57.02 units

Run it with your numbers

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

Last reviewed 2026-05-12.