I am struggling with the mathematical side of the PMP, specifically Earned Value Management and PERT formulas. With the new exam format, how many calculation-heavy questions should I realistically expect? I have memorized the formulas for CV, SV, CPI, and SPI, but applying them to complex word problems is taking me too long. Are there any shortcuts or mental models that help you solve these faster under pressure?
3 answers
You can breathe a sigh of relief because the current PMP exam has significantly fewer "pure" calculation questions than it used to. When I took it in early 2024, I only had about two questions where I actually had to use the calculator. Most EVM questions now ask you to interpret the data rather than calculate it. For example, if your CPI is 0.8, you need to know immediately that you are over budget without doing any heavy lifting. My advice is to focus on the "status" of the project. If CPI or SPI is less than 1.0, the project is in trouble. If it is greater than 1.0, you are doing great.
Cynthia, that is a huge relief! Does that mean we don't need to worry about the complex To-Complete Performance Index (TCPI) or Estimate at Completion (EAC) formulas anymore?
For PERT, just remember the $(P + 4M + O) / 6$ formula. I found that drawing a quick triangle for the Beta distribution helped me visualize the weighting of the 'Most Likely' estimate.
Sandra is right. The Beta distribution is much more common on the exam than the simple Triangular distribution. Just keep that '4' in the middle and you will be fine for any PERT question.
Jeffrey, you still need to know them, but focus on the "why." You might get a question asking which EAC formula to use if the current variances are expected to continue versus if they were a one-time anomaly. You won't necessarily have to crunch the big numbers, but you definitely need to understand which variable—like the remaining budget or the original BAC—is the most critical in that specific scenario.