Revise Financial efficiency ratios for Cambridge 9609 (10.2.3)

Financial efficiency ratios, also known as activity or asset management ratios, measure how effectively a business utilises its assets and manages its liabilities to generate revenue. Unlike profitability ratios that focus on margins, or liquidity ratios that focus on short-term solvency, efficiency ratios provide a crucial insight into the operational performance and internal management of a firm. They analyse the speed at which a company converts assets into sales or cash. For managers, these ratios are vital for identifying areas of operational weakness, such as poor inventory control or slow collection of debts. For investors and creditors, they indicate the competence of the management team in using the business's resource base to create value, directly impacting long-term profitability and sustainability.

The asset turnover ratio measures how efficiently a business uses its net assets to generate sales revenue. The formula is: Sales Revenue / Net Assets. A result of 2.5, for instance, means that for every £1 of net assets employed, the business generated £2.50 in sales. A higher ratio generally indicates greater efficiency, suggesting that assets are being worked hard. Conversely, a low ratio may imply that assets are underutilised or that the business is over-invested in its asset base relative to its sales volume. However, interpretation requires context; capital-intensive industries like manufacturing will naturally have lower asset turnover ratios than service-based businesses or retailers that rely on rapid sales from a smaller asset base.

The inventory days ratio, also known as stock days, calculates the average number of days a business holds its inventory before selling it. The formula is: (Average Inventory / Cost of Goods Sold) x 365. This ratio is a key indicator of inventory management efficiency. A low number of days is generally desirable, as it signifies that inventory is being sold quickly, minimising holding costs (storage, insurance, obsolescence) and freeing up cash. However, excessively low inventory days could increase the risk of stock-outs, leading to lost sales and customer dissatisfaction. A high number of days suggests poor sales, over-stocking, or inefficient supply chain management, all of which tie up working capital unnecessarily.

The trade receivables days ratio measures the average time it takes for a business to collect payments from its credit customers. The formula is: (Trade Receivables / Credit Sales) x 365. This ratio is a critical measure of a firm's credit control and its impact on cash flow. A shorter collection period is generally better, as it improves the company's liquidity by converting sales into cash more quickly. A high or rising number of receivables days may indicate poor credit control, an inefficient collections department, or that customers are facing financial difficulties. It is essential to compare this ratio to the standard credit terms offered by the business to judge its effectiveness.

The working capital cycle, or cash conversion cycle, synthesises key efficiency ratios to measure the time it takes to convert working capital into cash. It is calculated as: Inventory Days + Receivables Days - Payables Days. This figure represents the number of days from spending cash on raw materials to receiving cash from the final sale. A shorter cycle is highly desirable as it indicates the business is operating efficiently and has less cash tied up in its operations. Businesses can shorten the cycle by reducing inventory days (e.g., Just-in-Time), reducing receivables days (better credit control), or increasing payables days (negotiating better terms with suppliers), though the latter must be managed carefully to maintain good supplier relationships.

Asset turnover = $\frac{\text{Revenue}}{\text{Capital employed}}$

Inventory days = $\frac{\text{Inventory}}{\text{Cost of sales}} \times 365$

Receivables days = $\frac{\text{Trade receivables}}{\text{Credit sales}} \times 365$