Guide: Understanding and Answering Questions on Return on Investment (ROI) as per PMBOK Guide Seventh Edition
Importance: Return on Investment (ROI) is an integral part of cost management as it aids in assessing the efficiency of an investment or comparing efficiencies of different investments. From a project management perspective, it’s crucial because it offers a quantitative measure of the anticipated benefits against the project costs.
Definition: ROI is a ratio derived by dividing the net profit by the total investment. It is usually expressed as a percentage and is often used to make business decisions.
Working: To calculate ROI, the profit of an investment is divided by the cost of the investment and the result is expressed as a percentage or a ratio. Hence, ROI = (Net Profit / Cost of Investment) * 100.
Answering Questions: Read the exam questions carefully to understand the values given and what is asked. Make sure you’re familiar with the formula and calculations – especially on calculating net profits.
Exam Tips:
- The bigger the ROI, the better the investment
- Practice the ROI formula; accuracy in calculations is the key to getting these types of questions right on the exam
- ROI isn't always the best indication of project value, other factors like strategic fit, risk levels, and absolute cost should also be considered.
- Note that unlike other techniques, ROI takes both revenues and costs into account