Machine Vision & Industrial Inspection AI worked example

Annotation Workload at 14% rework and qa review allowance: a worked example

This worked example runs the annotation workload numbers for a tougher week than the baseline: 14% rework and qa review allowance instead of the typical 20%. Estimate total annotation labor hours needed to label a set of inspection images for AI model training, based on image count, annotation throughput, and a rework and QA allowance.

The inputs for this scenario

  • Total images to annotate: 5,000 images (held at the documented default)
  • Annotation throughput: 40 images / hr (held at the documented default)
  • Rework and QA review allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base annotation time = total images / annotation throughput.
  • Total annotation hours including rework works out to 143 hr at these inputs, and this is the headline figure for the scenario.
  • Base annotation hours works out to 125 hr at these inputs.
  • Rework and QA allowance added works out to 14 % at these inputs.
  • Annotation throughput works out to 40 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where rework and qa review allowance sits at 20% and the headline result is 150 hr, this scenario comes in 5% below the baseline at 143 hr.
  • Use it when planning a labeling campaign, quoting a vendor, or sizing internal annotator headcount against a delivery deadline. 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

  • Total annotation hours including rework: 143 hr (headline result)
  • Base annotation hours: 125 hr
  • Rework and QA allowance added: 14 %
  • Annotation throughput: 40 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Annotation Workload calculator, set rework and qa review allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.