Pharmaceutical, Biotech & GMP Manufacturing worked example

SIP Cycle Time at 7.2% schedule buffer: a worked example

Suppose schedule buffer falls to 7.2%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate steam-in-place campaign time from sterilization cycles, cycle completion rate, and schedule buffer.

The inputs for this scenario

  • SIP cycles required: 120 cycles (held at the documented default)
  • SIP cycle completion rate: 12 cycles / hr (held at the documented default)
  • Schedule buffer: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base time = SIP cycles required รท SIP cycle completion rate.
  • Adjusted run time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base run time works out to 10 hr at these inputs.
  • Allowance applied works out to 7.2 % at these inputs.
  • SIP completion rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where schedule buffer sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • It computes the buffer-adjusted hours needed to complete all required steam-in-place cycles given how many cycles run per hour. 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

  • Adjusted run time: 10.72 hr (headline result)
  • Base run time: 10 hr
  • Allowance applied: 7.2 %
  • SIP completion rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live SIP Cycle Time calculator, set schedule buffer to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.