Cycle Time Definitions
This describes the cycle time definitions.
- Leaf System
- Utilization
- Displayed in the Process Gantt Chart, it is the ratio in percentage between the total time of the operations and the system cycle time.
- Idle Time
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Cycle Time System Inheritance
When a system has a zero cycle time, it automatically inherits its parent system cycle-time. If the parent system itself has a zero cycle time, it remains zero.
For example, in this figure, defined cycle times are written next to the system:
Because of the inheritance principle, the result is:
- Root System has a zero cycle time, but it does not change because it has no parent.
- System D has a zero cycle time, so it inherits its parent System A cycle time: 100 sec.
- System B has a zero cycle time, but its parent Root System is zero, so System B stays with a zero cycle time.
- The other cycle times do not change.
Cycle Time Display
Once cycle times are defined for systems, they are displayed in different panels and Gantt charts.
Process Gantt Chart
In the Process Gantt Chart, cycle time is displayed by two vertical green bars called cycle bars. They appear if the system is a leaf system and has operations.
The cycle bars stretch from the top of a system row to the bottom of its last operation row.
If the leaf system has a zero cycle time, only the first bar is displayed.
When operations exceed the cycle time, in system view and product flow on cycle time view, they are cut and displayed underneath. For example, in the image below, OpF to OpH exceed the cycle time.
In the case of drifting operations, the drifted operations are colored violet.
