1. The document discusses two common methods for evaluating potential investments - payback period and average rate of return (ARR).
2. The payback period calculates the number of years it takes for an investment to pay for itself through cash flows. A shorter payback period is preferable as it represents less risk.
3. ARR assesses the worth of an investment by calculating average annual profit as a percentage of the initial cost. A higher ARR means a potentially more viable investment. Both methods were calculated for Machines A and B to determine which represents a better option.