Defense Electronics & Ruggedized Systems worked example

Shock/Vibration Test Capacity at 65% shock and vibe lab uptime: a worked example

Suppose shock and vibe lab uptime falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate usable shock and vibration test capacity for ruggedized electronics qualification, production screening, or lot acceptance.

The inputs for this scenario

  • Units per profile cycle on the table: 4 units / cycle (held at the documented default)
  • Scheduled shock/vibration profile cycles: 480 cycles (held at the documented default)
  • Shock/vibe lab uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass test release yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross shock/vibration test capacity = units tested per profile cycle × available shock/vibration cycles.
  • Released shock/vibration test capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross shock/vibration test capacity works out to 1,920 units at these inputs.
  • Shock/vibration lab downtime loss works out to 672 units at these inputs.
  • Shock/vibration retest yield loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where shock and vibe lab uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • It computes released test capacity as units per cycle times available cycles, then derated by lab uptime and first-pass release yield, and breaks out the downtime and retest losses. 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

  • Released shock/vibration test capacity: 1,211 units (headline result)
  • Gross shock/vibration test capacity: 1,920 units
  • Shock/vibration lab downtime loss: 672 units
  • Shock/vibration retest yield loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Shock/Vibration Test Capacity calculator, set shock and vibe lab uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.