Asphalt, Road Materials & Paving Products worked example

Asphalt Quality Sample Frequency at 68% sampling crew availability: a worked example

Suppose sampling crew availability falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Plan asphalt QC sample count and inspection hours from lots, tests per lot, and sampling frequency.

The inputs for this scenario

  • QC samples required per sublot: 2 units / cycle (held at the documented default)
  • Sublots or paving runs scheduled: 20 cycles (held at the documented default)
  • Sampling crew availability: 68 % (the input this scenario stresses; the baseline uses 95)
  • Specification sampling validity rate: 100 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Planned asphalt QC samples = required samples per sublot × sublots or runs scheduled.
  • Usable asphalt QC sample capacity works out to 27.2 samples at these inputs, and this is the headline figure for the scenario.
  • Planned asphalt QC samples works out to 40 samples at these inputs.
  • Samples lost to crew/access limits works out to 12.8 samples at these inputs.
  • Samples lost to invalid or missed checks works out to 0 samples at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where sampling crew availability sits at 95% and the headline result is 38 samples, this scenario comes in 28.42% below the baseline at 27.2 samples.
  • It computes usable asphalt QC sample capacity by multiplying planned samples (per-sublot frequency x scheduled sublots) by crew availability and the rate of valid, spec-compliant checks. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Usable asphalt QC sample capacity: 27.2 samples (headline result)
  • Planned asphalt QC samples: 40 samples
  • Samples lost to crew/access limits: 12.8 samples
  • Samples lost to invalid or missed checks: 0 samples

Run it with your numbers

  • To rerun this with your own numbers, open the live Asphalt Quality Sample Frequency calculator, set sampling crew availability to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.