Mixing, Blending & Industrial Batch Processing worked example
Blend Time at 17% process allowance: a worked example
Push process allowance up to 17% and the picture changes. This example computes every intermediate figure at that operating point. Use it when a recipe is being slotted into the schedule and you need an honest mixer occupancy time, not just the impeller spin time on the SOP.
The inputs for this scenario
- Batch size: 1,200 kg (unchanged)
- Mixer blend throughput: 600 kg / hr (unchanged)
- Process allowance: 17 % (raised for this scenario; the documented default is 15)
Working through the calculation
- Applying the documented formula (Base blend time = batch size รท mixer blend throughput) to the inputs above produces each figure below.
- At this operating point the engine returns 2.34 hr for adjusted run time, the number this scenario is built around.
- At this operating point the engine returns 2 hr for base run time.
- At this operating point the engine returns 17 % for allowance applied.
- At this operating point the engine returns 600 pieces / min for process rate.
How this compares with the baseline
- Against the tool's baseline example, where process allowance sits at 15% and the headline result is 2.3 hr, this scenario comes in 1.74% above the baseline at 2.34 hr.
- It divides batch size by mixer blend throughput for a base time, then inflates it by your process allowance to give an adjusted blend time. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.
Results at a glance
- Adjusted run time: 2.34 hr (headline result)
- Base run time: 2 hr
- Allowance applied: 17 %
- Process rate: 600 pieces / min
Run it with your numbers
- Every input above is editable in the live Blend Time calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.