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Process Bottleneck & Parallel Station Capacity Calculator
Compare three serial stages with parallel stations per stage and identify the limiting nominal period capacity.
Bottleneck capacity calculator
Compare three serial stages with parallel stations per stage and identify the limiting nominal period capacity.
YOUR RESULT LIVE CALCULATION
Smallest nominal stage capacity
630units / period
LIMITING STAGE: B- Stage A whole-unit capacity
- 840 units
- Stage B whole-unit capacity
- 630 units
- Stage C whole-unit capacity
- 1,008 units
- Demand not covered by nominal capacity
- 170 units
Whole-unit completions are rounded per station. Nominal stage capacity does not include pipeline startup, blocking, yield losses, or shared labor.
BEHIND THE NUMBER
How the calculation works
Each station completes whole units independently, so rounding is applied before multiplying by parallel stations. All stages process the same unit one-for-one. Every station has the same net availability, and parallel workloads can be balanced. Ties are shown as multiple limiting stages.
Stage capacity = parallel stations x floor(available minutes x 60 / cycle seconds); nominal process capacity = minimum stage capacity
When this calculation helps
A series process can be limited by the stage with the lowest effective throughput, even when other stages have spare capacity. Express every stage in a compatible output unit.
Check the interpretation
Increasing a non-bottleneck stage may add waiting stock without increasing final output. Product mix, setups, parallel equipment, yield, and variability can change the constraint. Reassess the whole flow after an improvement rather than preserving an obsolete bottleneck label.
Nominal capacity is not guaranteed finished output. Startup pipeline time, blocking, starvation, changeovers, yield loss, variable cycle times, and shared workers are not modeled. Availability must already exclude planned downtime.
Good to know
Why round each station separately?
Two partially completed units on different stations cannot be combined into one completed unit. Multiplying available time first can overstate whole-unit completions.
Can more than one stage be limiting?
Yes. Equal minimum capacities are all reported. Improving one tied stage alone may leave another stage as the same capacity limit.