Integral Logistics Management — Operations Management and Supply Chain Management Within and Across Companies

13.7.3 Exercise: Network Planning

Intended learning outcomes: Calculate a scheduled network with incomplete data for six operations and a start operation (administration time. Determine the critical path.



Figure 13.7.3.1 shows a scheduled network with incomplete data for 6 operations and a start operation (administration time).

Fig. 13.7.3.1       Scheduled network (for you to complete).

a.    For each process, please fill in the earliest start date (ESD) and the latest start date (LSD) in the scheduled network. What is the critical path, that is, the path with the longest duration? What is its lead-time margin, that is, the slack time?

b.    The operation time for operation 6 has not yet been determined. What is the longest possible time for operation 6 (lead-time margin = zero)?

Solutions:

a.    For the time being, as long as the time for operation 6 is still open, the longest path is (start – op1 – op3 – op5 – end). Lead-time margin = 7.

b.    As soon as the time for operation 6 is greater than 4, the longest path is (start – op1 – op3 – op6 – end). The longest possible time for op6 is 11.




Course section 13.7: Subsections and their intended learning outcomes