Mixing, Blending & Industrial Batch Processing worked example
Changeover Cleaning Time at 29% cip allowance: a worked example in mixing, blending & industrial batch processing
What does the result look like when cip allowance reaches 29%? The full calculation is worked below with real intermediate numbers. Use it when a recipe changeover is going on next week's schedule and you need an honest CIP and wash time before the next batch can start.
The inputs for this scenario
- Wetted surface to clean: 350 sq ft (unchanged)
- Crew clean rate: 120 sq ft / hr (unchanged)
- CIP allowance: 29 % (raised for this scenario; the documented default is 25)
Working through the calculation
- Applying the documented formula (Base clean time = wetted surface รท crew clean rate) to the inputs above produces each figure below.
- At this operating point the engine returns 3.76 hr for adjusted run time, the number this scenario is built around.
- At this operating point the engine returns 2.92 hr for base run time.
- At this operating point the engine returns 29 % for allowance applied.
- At this operating point the engine returns 120 pieces / min for process rate.
How this compares with the baseline
- Against the tool's baseline example, where cip allowance sits at 25% and the headline result is 3.65 hr, this scenario comes in 3.2% above the baseline at 3.76 hr.
- A figure at this level is achievable when cip allowance is genuinely sustained, not just peaked for a shift. It assumes a single uniform clean rate across all surfaces; heavily fouled zones, dead legs, or validated allergen cleans can take far longer than a flat rate predicts.
Results at a glance
- Adjusted run time: 3.76 hr (headline result)
- Base run time: 2.92 hr
- Allowance applied: 29 %
- Process rate: 120 pieces / min
Run it with your numbers
- Every input above is editable in the live Changeover Cleaning Time calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.