CPM MRP & Production Control 3

Question 1

A Rough-Cut Capacity Plan (RCCP) differs from Capacity Requirements Planning (CRP) in that RCCP:

Accepted Answer

Checks capacity at only key or critical resources against the MPS, before MRP is run

Answer

RCCP is a quick check of critical resources against the MPS to validate feasibility before the detailed MRP explosion is performed.

Question 2

Which production scheduling approach sequences jobs to minimize the total time all jobs spend waiting and being processed (makespan)?

Accepted Answer

Johnson's Rule

Answer

Johnson's Rule is a scheduling algorithm that minimizes makespan for n jobs processed through two machines in sequence.

Question 3

In MRP II, what does the 'resource planning' module address that basic MRP does not?

Accepted Answer

Long-range capacity planning including capital equipment and workforce needs

Answer

Resource planning in MRP II provides long-range aggregate capacity planning covering equipment, facilities, and workforce over a multi-year horizon.

Question 4

What is the primary purpose of safety stock in an MRP environment?

Accepted Answer

To buffer against demand variability and supply uncertainty so that net requirements are met even when inputs are unpredictable

Answer

Safety stock protects service levels against variability in demand or replenishment lead times, acting as a buffer in the MRP inventory record.

Question 5

A planned order release in MRP becomes a 'firm planned order' when a planner:

Accepted Answer

Manually freezes the order so the system will not automatically change it during re-planning

Answer

A firm planned order is manually protected from automatic rescheduling, giving the planner control over a specific order during the re-planning process.

(CPM) Certified Plant Manager Practice Test

(CPM) Certified Plant Manager Practice Test

CPM MRP & Production Control 3