• Any decision that requires the use of resources is an investment decision; thus,
investment decisions cover everything from broad strategic decisions at one extreme
to decisions on how much inventory to carry at the other.
• There are two basic approaches to investment analysis; in the equity approach, the
returns to equity investors from a project are measured against the cost of equity to
decide on whether to take a project; in the firm approach, the returns to all investors
in the firm are measured against the cost of capital to arrive at the same judgment.
• Accounting rate of return measures, such as return on equity or return on capital,
generally work better for projects that have large initial investments, earnings that are
roughly equal to the cash flows, and level earnings over time. For most projects,
accounting returns will increase over time, as the book value of the assets is
depreciated.
• Payback, which looks at how quickly a project returns its initial investment in
nominal cash flow terms, is a useful secondary measure of project performance or a
measure of risk, but it is not a very effective primary technique because it does not
consider cash flows after the initial investment is recouped.
• Discounted cash flow methods provide the best measures of true returns on projects
because they are based upon cashflows and consider the time value of money.
• Among discounted cash flow methods, net present value provides an un-scaled
measure while internal rate of return provides a scaled measure of project
performance. Both methods require the same information, and, for the most part, they
agree when used to analyze independent projects. The internal rate of return does tend
to overstate the return on good projects because it assumes that intermediate cash
flows get reinvested at the internal rate of return. When analyzing mutually exclusive
projects, the internal rate of return is biased towards smaller projects and may be the
more appropriate decision rule for firms that have capital constraints.
• Firms seem much more inclined to use internal rate of return than net present value as
a investment analysis tool; this can be partly attributed to fact that IRR is a scaled
measure of return, and partly to capital rationing constraints firms may face.