Jewelry, Watches & Precision Luxury Goods worked example

Polishing Time at 11% compound change and inspection allowance: a worked example

This worked example runs the polishing time numbers for a tougher week than the baseline: 11% compound change and inspection allowance instead of the typical 15%. Estimate total polishing and finishing labor hours for a batch of jewelry or watch components. Covers hand polishing, machine buffing, and tumbling operations. Accounts for piece count, polishing rate, and allowances for compound changes, wheel dressing, and quality checks between stages.

The inputs for this scenario

  • Pieces to polish: 50 pieces (held at the documented default)
  • Polishing throughput rate: 6 pieces / hr (held at the documented default)
  • Compound change and inspection allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base polishing time = pieces to polish รท polishing throughput rate.
  • Scheduled polishing time works out to 9.25 hr at these inputs, and this is the headline figure for the scenario.
  • Base polishing time works out to 8.33 hr at these inputs.
  • Compound and inspection allowance applied works out to 11 % at these inputs.
  • Polishing throughput rate works out to 6 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where compound change and inspection allowance sits at 15% and the headline result is 9.58 hr, this scenario comes in 3.48% below the baseline at 9.25 hr.
  • Use it when scheduling the finishing room, sizing a batch before final QC, or pricing the polishing portion of a job. 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

  • Scheduled polishing time: 9.25 hr (headline result)
  • Base polishing time: 8.33 hr
  • Compound and inspection allowance applied: 11 %
  • Polishing throughput rate: 6 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Polishing Time calculator, set compound change and inspection allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.