
Paper F9: Financial management
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2.3 Advantages and disadvantages of using the ARR method
The main advantages of the ARR are that:
It is fairly easy to understand. It uses concepts that are familiar to business
managers, such as profits and capital employed.
It is easy to calculate.
However, there are significant disadvantages with the ARR method.
It is based on accounting profits, and not cash flows. However investments are
about investing cash to obtain cash returns. Investment decisions should
therefore be based on cash flows, and not accounting profits.
Accounting profits are an unreliable measure. For example, the annual profit
and the average annual investment can both be changed simply by altering the
rate of depreciation and the estimated residual value.
The ARR method ignores the timing of the accounting profits. Using the ARR
method, a profit of $10,000 in Year 1 and $90,000 in Year 2 is just as valuable as a
profit of $90,000 in Year 1 and $10,000 in Year 2. However, the timing of profits
is significant, because the sooner the cash returns are received, the sooner they
can be reinvested to increase returns even more.
The ARR is a percentage return, relating the average profit to the size of the
investment. It does not give us an absolute return. However the absolute return
can be significant. For example if the ARR on an investment of $1,000 is 50%, the
average profit is $500; whereas if the ARR on an investment of $1 million is 20%,
the average annual profit will be $200,000. An accounting return of $200,000 on
an investment of $1 million might be preferred to an accounting return of 50%
on an investment of $1,000.
When using the ARR method for investment appraisal, a decision has to be
made about what the minimum target ARR should be. There is no rational
economic basis for setting a minimum target for ARR. Any such minimum target
accounting return is a subjective target, with no economic or investment
significance.
Exercise 1
A capital project would involve the purchase of an item of equipment costing
£240,000. The equipment will have a useful life of six years and would generate cash
flows of £66,000 each year for the first three years and £42,000 each year for the final
three years.
The scrap value of the equipment is expected to be £24,000 after six years. An
additional investment of £40,000 in working capital would be required.
The business currently achieves a return on capital employed, as measured from the
data in its financial statements, of 10%.