Measurement, Test & Control Equipment worked example

Firmware Load Time at 5.76% retry and recovery allowance: a worked example

This worked example runs the firmware load time numbers for a tougher week than the baseline: 5.76% retry and recovery allowance instead of the typical 8%. Estimate total time required to flash firmware on a batch of devices during production testing. Includes download time, verification, and retry allowance to plan test station scheduling.

The inputs for this scenario

  • Units to program: 200 units (held at the documented default)
  • Firmware load time per unit: 2.5 min / unit (held at the documented default)
  • Retry and recovery allowance: 5.76 % (the input this scenario stresses; the baseline uses 8)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base firmware time = units to program x firmware load time per unit.
  • Total firmware load time (hours) works out to 84.61 hr at these inputs, and this is the headline figure for the scenario.
  • Base firmware time (hours) works out to 80 hr at these inputs.
  • Retry and recovery time (hours) works out to 5.76 % at these inputs.
  • Programming rate (units/min) works out to 2.5 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where retry and recovery allowance sits at 8% and the headline result is 86.4 hr, this scenario comes in 2.07% below the baseline at 84.61 hr.
  • Use it when planning a programming station's workload for a build, quoting a contract-manufacturing flashing job, or deciding how many programmer fixtures you need to clear a backlog. 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 firmware load time (hours): 84.61 hr (headline result)
  • Base firmware time (hours): 80 hr
  • Retry and recovery time (hours): 5.76 %
  • Programming rate (units/min): 2.5 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Firmware Load Time calculator, set retry and recovery allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.