This document discusses three ratios that measure efficiency: 1) Asset turnover ratio compares sales to assets to assess how efficiently assets generate revenue. 2) Stock turnover rate calculates the average days to convert stock to sales, ideally as low as possible. 3) Debtor turnover rate measures average days to collect cash from debtors, ideally as low as possible. It is important to manage stock, debtors, and convert stock to cash efficiently.