Scheduling across shifts

Thanks for the information a lot to read over and mull over. A question regarding scheduling blocks. In your example you state an 8 hour shift with 40 hour operation requires 5 scheduling blocks. This makes sense. However, I dont need the operation to finish in a single shift which is what I believe this set up is doing? Secondly, would this not tie up all my resources to a single job/op for the full shift? It is likely I will have multiple jobs running concurrently at different stages of completion. Would this prevent these other jobs from being scheduled as all my resources are tied up in the 5 cheduling blocks?