Coffee, Tea, Roasting & Dry Goods Processing worked example

Roast Curve Capacity at 99% roaster uptime during profile runs: a worked example

Push roaster uptime during profile runs up to 99% and the picture changes. This example computes every intermediate figure at that operating point. planning roasted coffee output by profile, roaster, or shift

The inputs for this scenario

  • Roasted output per batch: 84 lb / batch (unchanged)
  • Planned roast batches: 22 batches (unchanged)
  • Roaster uptime during profile runs: 99 % (raised for this scenario; the documented default is 86)
  • First-pass roasted release yield: 98 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross roast curve capacity = roasted output per batch × planned roast batches) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,793 lb for usable roast curve capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,848 lb for gross roast curve capacity.
  • At this operating point the engine returns 18.48 lb for roast curve capacity lost to downtime.
  • At this operating point the engine returns 36.59 lb for roast curve capacity lost to shrink or rejects.

How this compares with the baseline

  • Against the tool's baseline example, where roaster uptime during profile runs sits at 86% and the headline result is 1,557 lb, this scenario comes in 15.12% above the baseline at 1,793 lb.
  • It computes gross capacity as batch output times planned batches, then usable capacity by applying roaster uptime and first-pass release yield, and quantifies pounds lost to downtime and to shrink or rejects. 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

  • usable roast curve capacity: 1,793 lb (headline result)
  • gross roast curve capacity: 1,848 lb
  • roast curve capacity lost to downtime: 18.48 lb
  • roast curve capacity lost to shrink or rejects: 36.59 lb

Run it with your numbers

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

Last reviewed 2026-05-12.