Mixing, Blending & Industrial Batch Processing worked example

Material Variance at 99% recovery factor: a worked example in mixing, blending & industrial batch processing

This scenario runs the material variance calculation on the strong side: 99% recovery factor, with every other input held at its documented default. Use it when batch records show over or under usage on a recipe and you need a clean variance ratio for the month-end material reconciliation.

The inputs for this scenario

  • Actual material used: 260 kg (unchanged)
  • Standard recipe charge: 250 kg (unchanged)
  • Recovery factor: 99 % (raised for this scenario; the documented default is 98)

Working through the calculation

  • Applying the documented formula (Usage ratio = actual material used รท standard recipe charge) to the inputs above produces each figure below.
  • At this operating point the engine returns 1.03 ratio for effective throughput, the number this scenario is built around.
  • At this operating point the engine returns 1.04 ratio for raw throughput.
  • At this operating point the engine returns 99 % for efficiency.
  • At this operating point the engine returns 250 hr for runtime.

How this compares with the baseline

  • Against the tool's baseline example, where recovery factor sits at 98% and the headline result is 1.02 ratio, this scenario comes in 1.02% above the baseline at 1.03 ratio.
  • Use it to monitor recipe adherence, flag chronic overcharging, and quantify true material loss after recycle. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Effective throughput: 1.03 ratio (headline result)
  • Raw throughput: 1.04 ratio
  • Efficiency: 99 %
  • Runtime: 250 hr

Run it with your numbers

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

Last reviewed 2026-05-12.