PMP Process — Managing Technical Aspects Practice Question
Your project is using a critical chain method. You have identified that the project buffer is being consumed faster than planned due to delays in several tasks. What should you do?
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
✓
Analyze the reasons for the delays and implement corrective actions to prevent further buffer erosion.
The PM should analyze the root causes of the delays and take corrective actions to protect the buffer. This may involve resource reallocation or schedule compression techniques.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Expedite the remaining tasks by adding more resources to critical chain tasks.
Why it's wrong here
Expediting remaining tasks by adding more resources, also known as crashing, is a tactical response that might reduce individual task durations. However, in Critical Chain Project Management (CCPM), the priority when buffers are consumed is to understand why the delays are occurring. Blindly adding resources without a root cause analysis can be an inefficient and costly approach, potentially addressing symptoms rather than underlying systemic issues, and may not prevent future buffer erosion or protect the project's overall completion date effectively.
- ✓
Analyze the reasons for the delays and implement corrective actions to prevent further buffer erosion.
Why this is correct
This is the correct and most effective approach in Critical Chain Project Management (CCPM). When project or feeding buffers show significant consumption, it serves as an early warning signal that the project is deviating from its plan. The project manager must proactively conduct a thorough root cause analysis to identify the specific reasons for the delays, such as scope creep, resource contention, or technical challenges. Subsequently, implementing targeted corrective actions based on this analysis is crucial to mitigate the identified issues, prevent further buffer erosion, and protect the project's original completion date.
- ✗
Add more buffer to the project schedule to accommodate the delays.
Why it's wrong here
Adding more buffer to the project schedule is a reactive and often counterproductive measure in Critical Chain Project Management (CCPM). Buffers are strategically sized and placed to absorb inherent uncertainties, not to be arbitrarily increased when delays occur. Simply inflating the buffer without addressing the underlying causes of buffer consumption fails to resolve systemic issues, can lead to an artificially extended project duration, and undermines the efficiency gains sought by CCM. It postpones the problem rather than solving it, potentially increasing overall project cost and time.
- ✗
Inform stakeholders that the project will likely be delayed and request additional time.
Why it's wrong here
While transparent communication with stakeholders is a vital project management responsibility, immediately informing them of a likely delay and requesting additional time without prior analysis and internal mitigation efforts is premature. A project manager's primary duty upon detecting buffer erosion is to investigate the causes, explore potential corrective actions, and attempt to bring the project back on track. Only after a thorough assessment, and if internal efforts prove insufficient, should stakeholders be informed with a clear understanding of the situation, proposed solutions, and a revised outlook.
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