7–2
7–9 Possible causes of a favorable direct materials price variance are:
purchasing officer negotiated more skillfully than was planned in the budget,
purchasing manager bought in larger lot sizes than budgeted, thus obtaining quantity
discounts,
materials prices decreased unexpectedly due to, say, industry oversupply,
budgeted purchase prices were set without careful analysis of the market, and
purchasing manager received unfavorable terms on nonpurchase price factors (such as
lower quality materials).
7–10 Some possible reasons for an unfavorable direct manufacturing labor efficiency variance
are the hiring and use of underskilled workers; inefficient scheduling of work so that the
workforce was not optimally occupied; poor maintenance of machines resulting in a high
proportion of non–value–added labor; unrealistic time standards. Each of these factors would
result in actual direct manufacturing labor–hours being higher than indicated by the standard
work rate.
7–11 Variance analysis, by providing information about actual performance relative to
standards, can form the basis of continuous operational improvement. The underlying causes of
unfavorable variances are identified and corrective action taken where possible. Favorable
variances can also provide information if the organization can identify why a favorable variance
occurred. Steps can often be taken to replicate those conditions more often. As the easier changes
are made, and perhaps some standards tightened, the harder issues will be revealed for the
organization to act on—this is continuous improvement.
7–12 An individual business function, such as production, is interdependent with other
business functions. Factors outside of production can explain why variances arise in the
production area. For example:
poor design of products or processes can lead to a sizable number of defects,
marketing personnel making promises for delivery times that require a large number
of rush orders can create production–scheduling difficulties, and
purchase of poor–quality materials by the purchasing manager can result in defects
and waste.
7–13 The plant supervisor likely has good grounds for complaint if the plant accountant puts
excessive emphasis on using variances to pin blame. The key value of variances is to help
understand why actual results differ from budgeted amounts and then to use that knowledge to
promote learning and continuous improvement.
7–14 The sales–volume variance can be decomposed into two parts: a market–share variance
that reflects the difference in budgeted contribution margin due to the actual market share being
different from the budgeted share; and a market–size variance, which captures the impact of
actual size of the market as a while differing from the budgeted market size.
7–15 Evidence on the costs of other companies is one input managers can use in setting the
performance measure for next year. However, caution should be taken before choosing such an
amount as next year‘s performance measure. It is important to understand why cost differences
across companies exist and whether these differences can be eliminated. It is also important to
examine when planned changes (in, say, technology) next year make even the current low–cost
producer not a demanding enough hurdle.
© 2012 Pearson Education, Inc. Publishing as Prentice Hall. SM Cost Accounting 14/e by Horngren