1. Tour - session 8 Detailed Scheduling
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Tour - session 8
Detailed Scheduling

2. Planned to Firm Work Order Conversion
Access: Planning menu, Planned to Firm Work Order Conversion option
Planned Work Orders
Firm Work Orders
Converts all the Planned Work Orders with a release date earlier or equal to the end date specified

3. Firm Work Orders
Access: Scheduling menu, Firm Work Order List option

4. 3 – Enter Machine information
Machine Entry
Access: Engineering menu, Work Center Maintenance option
2 – Click on ‘Machines’
1 - Select a work center
3 – Enter Machine information
4 - Validate

5. The Detailed Scheduling Function
The problem
On a short horizon (1 day to 1 month)
We assume that the capacity of each work center is balanced with the work load generated by the work orders
We have the list of work orders to be manufactured and the description of the operations to be performed
Work Centers
Standard Times
Due dates

6. Detailed Scheduling Objectives
Prepare a realistic work plan
Manage the priorities for executing the work orders
In order to
Provide the workshops a detailed planning of the work to be performed on each machine

7. Possible objectives Meet the due dates for each work order
Additional objectives:
Maximize capacity machine utilization (specially for bottleneck work centers)
Minimize WIP value (financial objective)
Maintain some flexibility (commercial objective)
Multiples objectives and partially contradictory

8. Detailed Scheduling Methods
Scheduling Work Order per Work Order
Forward scheduling
Backward scheduling
Choice of the loading priority
Scheduling by sequencing rules
Choice of a priority rule
Scheduling without Work orders (kanban)

9. Scheduling per work order
Centralized system
Work of the machine Gantt chart
Forward or backward loading
Work order per work order (all the operations of a work order are loaded at one time)
The results depends on the priority of work orders
Becomes wrong if real work differs from planned work due to unexpected event

10. Scheduling a work order
Operations
Op. 030
Machine 1
Op. 020
Op. 040
Machine 2
Op. 010
Machine 3
time

11. Preparing the machine schedules
Access: Scheduling menu, Finite Capacity Scheduling option
3 - Validate
1 - Select a scheduling end date
2 - Select ‘ Prepare Schedule ’

12. The Scheduling board
Access: Scheduling menu, Scheduling Charts option

13. Scheduling one Work Order
Select the work order
Launch scheduling
Operation are scheduled

14. Forward Scheduling Principle: Characteristics:
Operations are placed in the routing order
One operation is placed as soon as a free time slot with a duration equal to or greater than the operation duration is found
Characteristics:
Schedule can be accomplished even if due date is missed
Increases short term capacity utilization
Often causes buildup of WIP
Not very flexible (urgent sales order, breakdowns)

15. Forward scheduled work order

16. Backward scheduling Principle:
Begins with the due date of the final operation
Schedules jobs in reverse order
One operation is placed as soon as a free time slot with a duration equal to or greater than the operation duration is found
Characteristics:
Keeps free time in the short term
Minimizes WIP
A schedule is not always possible

17. Backward scheduled work order
Scheduling starts at the Due Date
Select Scheduling Backward

18. Forward scheduling of all work orders
Access: Scheduling menu, Finite Capacity Scheduling option
1- Select Forward Scheduling
2- Select the scheduling order of the WOs

19. The machine schedule

20. The work order schedule

21. Work Order Due Date Analysis
Access: Scheduling menu, Work Order Due Date Analysis option

22. Backward scheduling of all work orders
1- Select Backward Scheduling
2- Select the scheduling order of the WOs

23. The machine schedule

24. The work order schedule

25. Work Order Due Date Analysis
Access: Scheduling menu, Work Order Due Date Analysis option

26. Priority scheduling of all work orders
2- Select the Priority Rule
1- Select Priority Scheduling

27. The machine schedule

28. Resource Capacity Utilization
Access: Scheduling menu, Resource Capacity Utilization option

29. End of session 8