Chapter 14 – Business Unit Performance Measurement
14–15
• ROI increases each year under the historical cost method even though no operating
changes take place because the numerator is measured in current dollars to reflect current
cash transactions while the denominator and depreciation charges are based on historical
cost.
• The current cost method reduces the effect by adjusting both the depreciation in the
numerator and the investment base in the denominator to reflect price changes.
• See Exhibit 14.11 for a comparison of ROI under the historical cost and the current cost.
• Measuring current costs can be a difficult and expensive task.
• A level ROI is derived in the current cost, gross book value method because the asset
and all other prices increased at the same rate.
• If inflation affecting cash flows in the numerator increases faster (slower) than the
current cost of the asset in the denominator, ROI will increase (decrease) over the years
until asset replacement under the current cost method.
• Surveys of corporation practice show that the vast majority of companies with
investment centers used historical cost net book value.
• In general, how a performance measure is used is more important than how it is
calculated. As long as the measurement method is understood, it can enhance
performance evaluation.
♦ Using the beginning balance of the investment base could encourage asset acquisitions early in
the year to increase income for the entire year. Asset dispositions would be encouraged at the
end of the year to reduce the investment base for next year.
• If end-of-year balances are used, similar incentives exist to manipulate purchases and
acquisitions.
• Average investments would tend to minimize the problem, although it may be more
difficult to compute.
♦ Divisional income, ROI, residual income, and EVA are all financial performance measures that
consider the activities of the business unit independently of other units in the firm.
• Measuring the manager only on the basis of the division’s results risks suboptimal
decision making as the manager ignores the effect of the decisions on other business units.