Gypsum, Drywall & Interior Panel Manufacturing worked example

Starch/Additive Usage at 61% metering efficiency: a worked example

This worked example runs the starch/additive usage numbers for a tougher week than the baseline: 61% metering efficiency instead of the typical 85%. Estimate starch or additive required for a board production run based on boards to produce, additive dosage per board, and metering efficiency.

The inputs for this scenario

  • Boards to produce: 500 boards (held at the documented default)
  • Additive dosage per board: 0.08 lb / board (held at the documented default)
  • Metering efficiency: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Theoretical additive = boards to produce x additive dosage per board.
  • Required quantity works out to 65.57 lb at these inputs, and this is the headline figure for the scenario.
  • Theoretical amount works out to 40 lb at these inputs.
  • Loss allowance works out to 25.57 lb at these inputs.
  • Efficiency works out to 61 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where metering efficiency sits at 85% and the headline result is 47.06 lb, this scenario comes in 39.34% above the baseline at 65.57 lb.
  • Use it to size a batch or silo draw before a run, set min/max inventory, or quantify the giveaway from poor metering accuracy. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Required quantity: 65.57 lb (headline result)
  • Theoretical amount: 40 lb
  • Loss allowance: 25.57 lb
  • Efficiency: 61 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Starch/Additive Usage calculator, set metering efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.