TOC: Union Break Times
B: keep an employee on the bottleneck at all times for set ups
D: Change break times for workers
A: Keep employees happy while maximizing the capacity of the bottleneck
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C: Honor the contract of the Union
D': Follow the Union contract set up for employee break times
In order to Keep employees happy while maximizing the capacity of the bottleneck I must keep an employee on the bottleneck at all times for set ups and in order to keep an employee on the bottleneck at all times for set ups I must Change break times for workers. But, in order to Keep employees happy while maximizing the capacity of the bottleneck I must also Honor the contract of the Union and in order to Honor the contract of the Union I must Follow the Union contract set up for employee break times. I can't both Change break times for workers and Follow the Union contract set up for employee break times.
| Relation | Assumption(s) | Injection(s) |
| D-D' | 1. There is only one set of rules for break times 2. All employee break time must be the same | 1. You could make different rules for different departments for break times |
| B-D | 1. Employees are taking breaks and leaving machines unattended 2. Employees have to set up machines | 2. Buy a machine that does not have to be set up |
| C-D' | 1. The contract can not be broken | 1. Break the contract and deal with the consequences |
| A-B | 1. The only way to maximize the bottleneck is to keep it working constantly 2. Employees still have to be ensured a break | 2. make sure that employees are not taking a break at the same time |
| A-C | 1. The Union contract is to ensure employee satisfaction | 1. Not all employees may be satisfied with this contract |