1. Production Activity Control
Chapter 11
Vollmann, Berry, Whybark & Jacobs

2. Production Activity Control
PAC in the MPC System
Shop Floor Control
Vendor Scheduling
Production Activity Control Techniques
Basic Data/ lead time management
Gantt Charts
Priority Scheduling
Finite Loading
Process Design Impact on Scheduling
Batch Manufacturing – Work Orders
Repetitive Manufacturing – JIT

3. Production Activity Control in the MPC System

4. Figure 11.2 Example

5. Fig. 11.3 Routing Data and Operation Setback Chart

6. Time concepts: Lead time elements
Run time: operation or machine time per piece * lot size.
Setup time: time to prepare the work center, independent of work center.
Move time: delay waiting to be moved + move time from center to center.
Queue time: time spent waiting to be processed (depends on work load and schedule).

7. Lead time management Lead time vs. WIP
Substitute information for inventory
Changing lead time information:
Systematically through DBS
Recalculate using various methods
Lead time  Queue time issues

8. Priority Sequencing Rules
A rule for what job to process next:
First Come, First Served
Shortest Operation Next
Earliest Due Date
Order Slack (least): (Time Remaining until Due Date – Sum of Remaining Setup and Run Time)
Slack per Operation (least)
Critical Ratio: (Due Date-Now)/(Lead Time Remaining) (least)
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Lead Time Remaining includes setup, run, move and queue time for all remaining operations.

9. End of Chapter