This article describes in more depth how to use auto-scheduling, strict auto scheduling, and the critical path.
For this example, we use a simple Gantt on how to clean a car in 8 steps, one list for the interior, one list for the exterior.
We have created dependencies between the different steps for the interior and the exterior. This indicates that one steps should be finished for the other step to start.
The critical path is highlighted in Red, in this stage the steps to clean the exterior are on the critical path (please read more below on how the critical path works)
Note: For the sake of this example, we don't have any dependencies between cleaning the interior and exterior. (although in reality you will do one after the other).