The two float times serve different purposes:
Float before production
Is used to shift the date and plan capacities.
Float after production
Is used to deal with malfunctions.
Figure 66: Scheduling and Time Components in an Order
The order float can be predefined in Customizing and the material master (scheduling margin key).
The duration of an operation consists of a maximum of five time components:
• Queue time
• Setup time
• Processing time
• Teardown time
• Process-related wait time
The duration of the move time lies between two operations but is assigned to the preceding operation.
The material requirement is scheduled from the earliest start date (you can change this in Customizing).
The capacity requirement can be displayed on the earliest or latest start date.
Figure 67: Time Components and their Origins
You maintain time elements for lead time scheduling in various places within the PP application.
It is important to make the correct settings and use the system properly for successful scheduling.
The interoperation time in the material master is calculated from:
• Order float (float before and after production)
• Operation float (queue time)
• Wait time
• Move time
The system can carry out reduction measures in lead time scheduling for orders.
Figure 68: Reduction Measures
You can set the time elements that can be reduced as well as the reduction strategy in Customizing (for each order category and planner group).
You can also specify reduction for the floats before and after production in the order or in Customizing for each plant, order type and planner group.
Exercise 8: Scheduling
Exercise Objectives
After completing this exercise, you will be able to:
• Schedule routings and update the in-house production time in the material master.
Business Example
As a member of the project team you are responsible for feasible and exact scheduling of the company’s products.
The following prerequisites need to be fulfilled:
• Lead time scheduling of a routing
• Preparation of reduction measures
• Maintain in-house production time in the material master
Task 1:
Solve the following problem:
1. Use the operation graphic to check the correct production cycle in group counter 2 for pump T-F##.
Hint: The operation graphic and scheduling in routing can only be done with transaction CA03.
Logistics → Production → Master Data → Routings → Routings → Standard Routings → Display
Task 2:
Schedule the new pump T-F## with group counter 2.
1. Schedule the pump T-F## with a forwards scheduling direction from the current date, and for a quantity of 50 pieces. Use the operation segments overview variant to view the schedule data.
2. Why is no processing time calculated in the standard sequence for operation 20 if a labor time of 10 minutes has been correctly defined?
3. Display the Gantt chart for your scheduling.
Continued on next page
4. Display the scheduling log and check the types of messages you have received, if any.
5. Check the scheduling results. How many interoperation times are scheduled?
6. Mark the material master for T-F## to be updated with your scheduling results.
Task 3:
Update the in-house production time in the material master, for production scheduler 0##, for T-F##.
1. Update the production lead-times based on the marking activity you did in exercise 2-6.
2. Check the results of your update in the material master for T-F##. Are the values that have been updated dependent or independent of lot size?
Hint: As an alternative, you can do the mass scheduling with an automatic update in the material master instead of doing lead time scheduling for each individual routing.
Logistics → Production → Master Data → Routings → Extras → Material Master → Schedule Material Master
Solution 8: Scheduling
Task 1:
Solve the following problem:
1. Use the operation graphic to check the correct production cycle in group counter 2 for pump T-F##.
Hint: The operation graphic and scheduling in routing can only be done with transaction CA03.
Logistics → Production → Master Data → Routings → Routings → Standard Routings → Display
a) Enter the material number T-F##, and the group counter 2.
Click Sequence Overview and Operation graphic.
Task 2:
Schedule the new pump T-F## with group counter 2.
1. Schedule the pump T-F## with a forwards scheduling direction from the current date, and for a quantity of 50 pieces. Use the operation segments overview variant to view the schedule data.
a) Extras → Scheduling → Schedule.
Enter the lot size 50 in the scheduling dialog box. Choose the overview variant 0...1.
2. Why is no processing time calculated in the standard sequence for operation 20 if a labor time of 10 minutes has been correctly defined?
a) The labor time has been defined, but the machine time is needed to complete the work center formula.
3. Display the Gantt chart for your scheduling.
a) Choose Gantt Chart or Extras → Scheduling → Gantt Chart.
4. Display the scheduling log and check the types of messages you have received, if any.
a) Choose Scheduling Log or Extras → Scheduling → Display Log.
Continued on next page
5. Check the scheduling results. How many interoperation times are scheduled?
a) Select Scheduling Results or Extras → Scheduling → Scheduling Results.
6. Mark the material master for T-F## to be updated with your scheduling results.
a) In the Scheduling Results dialog box select Update Material Master to mark the scheduling result for the update.
Task 3:
Update the in-house production time in the material master, for production scheduler 0##, for T-F##.
1. Update the production lead-times based on the marking activity you did in exercise 2-6.
a) Logistics → Production → Master Data → Routings → Extras → Material Master → Update Material Master
Make sure you select only your T-F## for the update. When the update has been completed you get the message: The material has been changed.
2. Check the results of your update in the material master for T-F##. Are the values that have been updated dependent or independent of lot size?
Hint: As an alternative, you can do the mass scheduling with an automatic update in the material master instead of doing lead time scheduling for each individual routing.
Logistics → Production → Master Data → Routings → Extras → Material Master → Schedule Material Master
a) Logistics → Production → Master Data → Material Master → Material
→ Display → Display Current
Choose the Work Scheduling screen to display the estimated in-house production times.
Lesson Summary
You should now be able to:
• Update the in-house production time of the routing in the material master
Unit Summary
You should now be able to:
• Assess the importance of lead time scheduling and updating in-house production time in the material master
• Maintaining the scheduling-relevant data in the work center
• Explain the connection between formulas and standard values
• Update the in-house production time of the routing in the material master
Test Your Knowledge
1. What is the lot size dependent in-house production time in the material master used for?
Choose the correct answer(s).
□ A Determine precise operation dates in planning
□ B Determine precise basic order dates in planning
□ C Determine the base quantity
□ D Mandatory requirement for creating an order
2. What steps are required to write the lot size dependent in-house production time to the material master?
Answers
1. What is the lot size dependent in-house production time in the material master used for?
Answer: B
2. What steps are required to write the lot size dependent in-house production time to the material master?
Answer:
• View a routing
• Schedule a routing
• View a scheduling result
• Flag for material master update
• Update material master