Pharmaceutical, Biotech & GMP Manufacturing worked example

SIP Cycle Time at 12% schedule buffer: a worked example

What does the result look like when schedule buffer reaches 12%? The full calculation is worked below with real intermediate numbers. Use it when GMP, QA, QC, validation, manufacturing, or operations teams need a quick planning estimate to plan sterile equipment availability and confirm SIP does not constrain batch start times.

The inputs for this scenario

  • SIP cycles required: 120 cycles (unchanged)
  • SIP cycle completion rate: 12 cycles / hr (unchanged)
  • Schedule buffer: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base time = SIP cycles required รท SIP cycle completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for adjusted run time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base run time.
  • At this operating point the engine returns 12 % for allowance applied.
  • At this operating point the engine returns 12 pieces / min for sip completion rate.

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 1.82% above the baseline at 11.2 hr.
  • A figure at this level is achievable when schedule buffer is genuinely sustained, not just peaked for a shift. It assumes a steady average cycle rate and does not model F0 hold variability, condensate drainage delays, or failed cycles that force a re-run.

Results at a glance

  • Adjusted run time: 11.2 hr (headline result)
  • Base run time: 10 hr
  • Allowance applied: 12 %
  • SIP completion rate: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live SIP Cycle Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.