CAPM Predictive Plan-Based Methodologies Practice Question
A project manager is estimating the duration of a task using parametric estimation. Historical data shows that a similar task took 10 hours per unit, and 50 units are required. The team's productivity is expected to be 20% slower due to new team members. What is the estimated duration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
600 hours
10 hours/unit * 50 units = 500 hours. With 20% slower productivity, the total hours = 500 * 1.2 = 600 hours. Option A (400 hours) is wrong because it uses a 20% reduction instead of increase. Option B (550 hours) is wrong because it uses a factor of 1.1 or incorrect calculation. Option C (500 hours) is wrong because it does not account for the 20% slowdown.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
400 hours
Why it's wrong here
This assumes a 20% increase in productivity, not decrease.
- ✗
550 hours
Why it's wrong here
This incorrectly adds 20% of 50, not of the total.
- ✗
500 hours
Why it's wrong here
This ignores the 20% slowdown factor.
- ✓
600 hours
Why this is correct
Correct calculation: 10*50=500, 500*1.2=600.
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