title: Ratios are useful for tracking performance.
mesh_terms: D002017:Budgets; D003365:Costs and Cost Analysis / Q000379:methods; D004526:Efficiency; D005375:Financial Audit / Q000706:statistics & numerical data*; D009873:Operating Rooms / Q000191:economics* / Q000458:organization & administration; D010561:Personnel Staffing and Scheduling / Q000191:economics; D014481:United States