Payback period

The time required for the cumulative net savings or earnings from an automation investment to equal its total cost. It is a simple screening measure: shorter payback means capital is recovered sooner and the project carries less exposure to changes in demand or product mix. Payback ignores benefits that continue after the break-even point and does not discount future cash flows, so it is best used alongside ROI or a discounted cash-flow analysis rather than as the sole decision criterion.