Take a simple example and see how that would be scheduled.
As you can see within each sequence, the longest task determines the start moment for the next sequence. Sequence 2 starts 4 weeks after the start of its predecessor sequence 1. The last sequence determines the scheduled end date of the case. With multiple steps, the longest task of the last sequence will decide the scheduled end date of the case. The case activities will end 2 weeks after the start of step 1 of task 5.