Stone, Countertops & Engineered Surfaces worked example

Edge Polishing Labor at 7.2% profile-change, buffing, and handling allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop profile-change, buffing, and handling allowance to 7.2%, then walk the calculation through step by step. Estimate edge polishing labor for stone, countertops and engineered surfaces using production-ready inputs so teams can plan labor hours, schedule the work, or check whether the job fits the available shift time.

The inputs for this scenario

  • Linear inches of edge to polish: 120 units (held at the documented default)
  • Polishing throughput per operator: 12 units / min (held at the documented default)
  • Profile-change, buffing, and handling allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base edge polishing labor time = edge polishing labor workload รท edge polishing labor completion rate.
  • Required edge polishing labor time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base edge polishing labor time works out to 10 hr at these inputs.
  • Edge polishing labor allowance applied works out to 7.2 % at these inputs.
  • Edge polishing labor completion rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where profile-change, buffing, and handling allowance sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to profile-change, buffing, and handling allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes one polishing rate, so intricate ogee or mitered edges that run far slower than a straight eased edge will take longer than the estimate suggests.

Results at a glance

  • Required edge polishing labor time: 10.72 hr (headline result)
  • Base edge polishing labor time: 10 hr
  • Edge polishing labor allowance applied: 7.2 %
  • Edge polishing labor completion rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Edge Polishing Labor calculator, set profile-change, buffing, and handling allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.