Line balancing calculator
Enter the tasks with their times and the desired cycle time: it calculates the theoretical minimum number of stations and the balancing efficiency.
Enter your process tasks with their standard time (in minutes) and the desired cycle time (or takt time). If you also enter how many real stations you plan to use, the line balancing efficiency is calculated.
| Task | Time (min) | |
|---|---|---|
Sum of times: 2.30 min
Theoretical minimum number of stations: 3
Balancing efficiency with 4 real stations: 71.9%
How it works
You enter the task times, the desired cycle time and, if you already have it, the real number of stations. The formulas are those of Niebel and Freivalds:
- Minimum stations = sum of the task times ÷ cycle time, rounded up (there is no such thing as half a station).
- Balancing efficiency = sum of the times ÷ (real stations × cycle time).
It is a reference calculation: it does not assign tasks to stations or respect precedence between tasks, which is the hard part of balancing. It tells you the best possible case and how much capacity is lost with the current split.
If you prefer to work in Excel, there is a line balancing spreadsheet in Excel with these same calculations.
Sources
These are the ones from the article where the theory behind this tool is developed.
Where do the formulas come from and how are tasks distributed among stations? It is in the article Line balancing.