Detailed Scheduling Flashcards
7 cards from real CPIM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Detailed Scheduling flashcards as text
What is 'Operation Splitting' and why is it used in detailed scheduling?
Answer: Dividing a work order across multiple time periods to reduce lead time
Operation splitting divides a work order into smaller lots that can be run simultaneously on multiple machines, reducing total lead time.
In MRP, what is the 'time fence' nearest to the current date that typically locks the schedule?
Answer: Frozen zone (firm planned horizon)
The frozen zone or firm planned horizon is the period closest to today where the master schedule is locked and changes require management approval to avoid disruption.
Which of the following is a primary input to detailed capacity requirements planning (CRP)?
Answer: Open work orders, planned orders, and routing data
CRP uses planned and open work orders combined with routing information (operations, work centers, run times) to calculate detailed capacity needs.
What scheduling approach is typically used in a repetitive manufacturing environment?
Answer: Rate-based scheduling tied to daily/weekly production rates
Repetitive manufacturing uses rate-based scheduling, where production is scheduled as a rate per period (e.g., 200 units/day) rather than as discrete work orders.
A machine center has a load of 500 hours scheduled in a 400-hour capacity week. What is the best short-term corrective action?
Answer: Authorize overtime or use an alternate work center
When short-term overloads occur, the typical corrective actions are authorizing overtime, adding shifts, or routing work to an alternate capable work center.
What does 'schedule adherence' measure in a manufacturing plant?
Answer: The percentage of work orders completed as scheduled in the detailed plan
Schedule adherence measures how well the shop floor executes the detailed schedule by tracking what percentage of work orders are completed on time as planned.
Which scheduling rule tends to minimize the average number of jobs in the system (WIP)?
Answer: Shortest Processing Time (SPT)
SPT minimizes average flow time and average WIP by completing short jobs quickly and clearing queue, proven mathematically optimal for minimizing average job completion time.