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Comparing Roasts With Batch Compare

Setup HelpReviewed 2026-10-26

Summary

Batch compare puts two to ten roasts side by side. Their curves are laid over each other on one chart, lined up on a milestone the roaster chooses, and a Metrics table compares each roast's numbers against a reference roast. From Rostoc 0.4.9 it is open to every account on every plan, in the desktop app (in its own window) and at web.rostoc.co (as a page).

Steps

  1. Open Batches, or a Plan's table of roasts. Point at a row and tick the checkbox that appears beside it. Tick two to ten roasts. A bar appears at the bottom of the screen with the number selected.
  2. Click Compare in the bar. It stays greyed out with fewer than two or more than ten ticked ("Compare takes 2 to 10 batches"). Clear, or the Escape key, removes the ticks.
  3. Batches and each Plan's table keep their own ticks, so roasts ticked on Batches are not ticked on a Plan's table.
  4. In the comparison, choose the milestone to line the curves up on with Align on: charge, turning point, dry end, first crack or drop.
  5. Read Metrics under the chart. Its heading names the reference roast, for example Metrics vs RB-0016; change the reference there. Each roast shows its milestone times, charge and drop temperature, development, weight loss and roast colour, with the difference from the reference. A colour on a different scale from the reference's is left out and says why.
  6. To add roasts from one Plan, use the Plan picker (or Any plan). A comparison opened from a Plan's table starts on that Plan.
  7. The Repeat score at the bottom is folded and marked Experimental. Show opens it, with what was left out and the weight of each measure. It measures how closely the roasts repeat the reference, not roast quality.
  8. Which probes each roast shows starts from its machine's Batch chart setting; the probe checkboxes in the comparison change that for this comparison only.

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