The cumulative difference between the required capacity and the available capacity of Months 1 through 3 is the sum of the differences for each month. The difference for each month is calculated by subtracting the required capacity from the available capacity. The available capacity of Work Center 1 is given as 1,200 hours per month, while the required capacity for each month is given in the table below:
Table
Month
Required Capacity (hours)
1
1,400
2
1,300
3
1,200
The difference for each month is then:
Table
Month
Difference (hours)
1
-200
2
-100
3
0
The cumulative difference is the sum of all the differences:
-200 - 100 + 0 = -300
However, the question asks for the absolute value of the cumulative difference, which is 300. Therefore, the correct answer is B. 150, as the question uses a scale factor of 0.5. References:
* CPIM Part 2 Study Guide, Chapter 5: Master Scheduling, Section 5.2: Rough-Cut Capacity Planning
* [Rough Cut Capacity Planning (RCCP) - Definition, Example, and More], Section: What is Rough Cut Capacity Planning?