Clinical, Diagnostics & Lab Consumables Manufacturing worked example

Stability Study Sample Count at 69% stability chamber and lab availability: a worked example

This worked example runs the stability study sample count numbers for a tougher week than the baseline: 69% stability chamber and lab availability instead of the typical 96%. Estimate available stability-study sample capacity across timepoints, conditions, pulls, and valid samples for diagnostic kits, reagents, and consumables.

The inputs for this scenario

  • Stability samples prepared per pull cycle: 36 samples / cycle (held at the documented default)
  • Planned stability pulls or timepoints: 18 cycles (held at the documented default)
  • Stability chamber and lab availability: 69 % (the input this scenario stresses; the baseline uses 96)
  • Valid stability samples after inspection and documentation: 98 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross stability study sample count = stability samples prepared per pull cycle × planned stability pulls or timepoints.
  • Usable stability study sample count works out to 438 accepted units at these inputs, and this is the headline figure for the scenario.
  • Gross stability study sample count works out to 648 accepted units at these inputs.
  • Stability Study Sample Count lost to availability limits works out to 201 accepted units at these inputs.
  • Stability Study Sample Count lost to rejects or invalid samples works out to 8.94 accepted units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where stability chamber and lab availability sits at 96% and the headline result is 610 accepted units, this scenario comes in 28.13% below the baseline at 438 accepted units.
  • Use it when designing a stability protocol, confirming sample sufficiency before pull-down, or reconciling planned versus usable samples mid-study. 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

  • Usable stability study sample count: 438 accepted units (headline result)
  • Gross stability study sample count: 648 accepted units
  • Stability Study Sample Count lost to availability limits: 201 accepted units
  • Stability Study Sample Count lost to rejects or invalid samples: 8.94 accepted units

Run it with your numbers

  • To rerun this with your own numbers, open the live Stability Study Sample Count calculator, set stability chamber and lab availability to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.