Decision criteria

Working capital is the amount of capital which is readily available to an organization. That is, working capital is the difference between resources in cash or readily convertible into cash (Current Assets), and cash requirements (Current Liabilities). As a result, the decisions relating to working capital are always current, i.e. short term, decisions.

In addition to time horizon, working capital decisions differ from capital investment decisions in terms of discounting and profitability considerations; they are also "reversible" to some extent. (Considerations as to Risk appetite and return targets remain identical, although some constraints - such as those imposed by loan covenants - may be more relevant here).

Working capital management decisions are therefore not taken on the same basis as long term decisions, and different criteria are applied here: the main considerations are cash flow and liquidity - cashflow is probably the more important of the two.

The most widely used measure of cash flow is the net operating cycle, or cash conversion cycle. This represents the time difference between cash payment for raw materials and cash collection for sales. The cash conversion cycle indicates the firm's ability to convert its resources into cash. Because this number effectively corresponds to the time that the firm's cash is tied up in operations and unavailable for other activities, management generally aims at a low net count. (Another measure is gross operating cycle which is the same as net operating cycle except that it does not take into account the creditors deferral period.)
In this context, the most useful measure of profitability is Return on capital (ROC). The result is shown as a percentage, determined by dividing relevant income for the 12 months by capital employed; Return on equity (ROE) shows this result for the firm's shareholders. As above, firm value is enhanced when, and if, the return on capital, exceeds the cost of capital. ROC measures are therefore useful as a management tool, in that they link short-term policy with long-term decision making.