Management Payback Period ROI Tools 
Harvard Business Review
APRIL 18, 2016
There are a variety of ways to calculate a return on investment (ROI) — net present value , internal rate of return , breakeven — but the simplest is payback period. What is payback period? Payback is by far the most common ROI method used to express the return you’re getting on an investment.
Harvard Business Review
JUNE 22, 2015
I talked with Jill Avery, a senior lecturer at Harvard Business School and co-author of HBR’s Go To Market Tools , to better understand how to use this important calculation. “It’s a pretty universal tool. The formula will tell the manager how many units will result in $10 million in profit. BEQ = 200 units.
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