Output input ratios - to evaluate business and it's key activities.

Use the efficiency and performance ratios to evaluate and measure the true performance of a business activity.

Analyzing  performance in 7 step approach

1. The Du Pont chart with the ROE/ROA at the end would be a good start to evaluate and identify the critical performance gaps.
• Return on Sales
• Asset Turnover
• Asset Equity multiplier 
2. Compare the business profit model with that of the industry standards.
• variable costs and fixed costs
• Price
• Volume
• Profits
3. Subsequently, the departmental KPI metrics could be a good measure of performance on each department.
• Marketing KPIs
• Warehouse
• Shops
• Distribution
• Advertising and promotion
• Salesmen
• Operations/Production KPIs
• Production costs
• Throughputs
• Material efficiency
• Labour efficiency
• Overhead efficiency
• Wastage
• HR KPIs
• Payroll
• Training
• Recruitment
• Staff Turnover
• Finance KPIs
4. The five set of financial ratios 
• Overall CEO performance
• Efficiency ratios based on working capital and fixed capital
• Financial Leverage
• Potential Trend
• Liquidity Management
5. Output / input dynamic ratios are the final evaluation where the impact on volume is neutralized.  This could be illustrated by a graph.  By this approach the opportunity costs or gains would be computed as well.
6. Supervisors Performance could be measured
7. Individual worker performance

For the purpose of remedial actions or turnaround, only the critical performance needs or gaps to be rectified or addressed.   Choose the key result areas at which with little effort and focus would have great impact on the bottom line.