12-2
Question 3
Variable manufacturing cost per pad is given in the case at $27.28 (material cost of $15.64 plus labor at
$11.64). The factory overhead absorption rule in Exhibit 2 (360% of factory labor) is a “set up” to see if students are
aware of the problems using an overall average to estimate the cost for a new product. Using this rule would
substantially overstate the manufacturing overhead involved in producing CMP pads.
can do is eliminate the $2.4 million pool related to automotive R&D.
A rough assignment of overhead per unit should also allow for the excess capacity in the factory.
Conceptually, excess capacity should not be charged to current production. If labor is a plausible driver for factory
overhead, in the long run, the $5.2 million should be spread across $3.5 million of labor ($2.1 million ÷ .6). This
implies an overhead rate of about 150% (5.2/3.5). For pads, this implies a manufacturing cost of about $45, as
follows:
Question 4
Exhibits TC-2 and TC-3 provide some necessary background calculations for this question. The key idea
for the question is that EVC per pad depends on the impact of the pad on the contractor’s operations. That impact
varies widely across the three segments highlighted in the case. In segment one, the contractor is operating at
capacity. Faster pile-driving converts directly to more revenue per year for the contractor. Costs of operation for the
contractor won’t change, but total feet driven will. The impact of the pads is the incremental revenue they will
produce.
In segment two, the pads will only save about twenty-two hours per job out of a total of about 4,100 hours