Formulas
- Annual manual hours = points × minutes per point × rounds per day × working days ÷ 60.
- Hours saved = annual manual hours × time reduction ÷ 100.
- Net annual benefit = hours saved × hourly labor cost − annual running cost.
- Simple payback in months = initial investment ÷ net annual benefit × 12, when net benefit is positive.
- First-year ROI (%) = (net annual benefit − initial investment) ÷ initial investment × 100, when investment is greater than zero.
Limitations and evidence to collect
This excludes taxes, depreciation, inflation, financing, time value of money and unverified accident or downtime benefits. Measure before and after the pilot across shifts, separating successful readings, retries and reviews. Do not double-count the same benefit as both labor and productivity savings.