I think you're asking how we would coach you to solve these types of problems, is that right?
This is a process optimization/throughput problem. Essentially, whenever we're looking at throughput, we need to figure out which step/s is/are the bottleneck. The bottleneck = where there is less throughput.
Throughput = units/time.
So, in this case, we need to grab potential throughput and multiply it by entitlement to see how many products go through that step/sub-process. Then, within each process, we need to add those sub-process #s together.
The process with the lowest total # (throughput) is your bottleneck and is where we should focus our efforts!