CMS Production Scheduling & Capacity Planning 2 — Questions and Answers
Question 1: Which scheduling technique assigns jobs to work centers based on the ratio of time remaining to work remaining?
- Critical Ratio (CR) (Correct answer)
- Shortest Processing Time (SPT)
- Earliest Due Date (EDD)
- First Come First Served (FCFS)
Correct answer: Critical Ratio (CR)
Critical Ratio is calculated as time remaining divided by work remaining, dynamically reprioritizing jobs as conditions change.
Question 2: In a finite capacity scheduling system, what happens when a resource becomes overloaded?
- Jobs are automatically rescheduled to available capacity slots (Correct answer)
- Jobs are added to a backlog and processed later
- The system increases labor to compensate
- Overtime is automatically triggered
Correct answer: Jobs are automatically rescheduled to available capacity slots
Finite capacity scheduling recognizes resource limits and moves jobs to feasible time slots rather than overcommitting resources.
Question 3: What does the term 'takt time' represent in production scheduling?
- The available production time divided by customer demand rate (Correct answer)
- The time required to complete one unit from start to finish
- The maximum throughput of a bottleneck operation
- The planned downtime per shift
Correct answer: The available production time divided by customer demand rate
Takt time sets the production rhythm needed to meet customer demand and is calculated as available time divided by required units.
Question 4: Which capacity planning input identifies the standard hours required to produce one unit of a specific product?
- Routing (Correct answer)
- Bill of Materials (BOM)
- Master Production Schedule (MPS)
- Capacity Requirements Plan (CRP)
Correct answer: Routing
The routing file specifies the sequence of operations, work centers, and standard run/setup times per unit for each product.
Question 5: A plant operates 20 days/month, 2 shifts/day, 8 hours/shift. Planned efficiency is 85% and utilization is 90%. What is demonstrated capacity per work center per month?
- 122.4 hours (Correct answer)
- 320 hours
- 272 hours
- 144 hours
Correct answer: 122.4 hours
Demonstrated capacity = 20 × 2 × 8 × 0.85 × 0.90 = 122.4 hours per work center per month.
Question 6: In the Theory of Constraints (TOC), what is the primary goal of scheduling non-bottleneck resources?
- To subordinate their schedule to the bottleneck's pace (Correct answer)
- To maximize their individual throughput
- To minimize their idle time
- To run at 100% utilization
Correct answer: To subordinate their schedule to the bottleneck's pace
TOC requires non-bottleneck resources to synchronize with and support the bottleneck rather than optimize independently.
Question 7: Which scheduling approach is most appropriate for a job shop environment with highly varied, custom orders?
- Priority dispatching rules (Correct answer)
- Line balancing
- Level scheduling
- Mixed-model sequencing
Correct answer: Priority dispatching rules
Priority dispatching rules (SPT, EDD, CR, etc.) dynamically sequence jobs through job shops where routing and demand vary widely.
CMS Production Scheduling & Capacity Planning 2
Which scheduling technique assigns jobs to work centers based on the ratio of time remaining to work remaining?