Quick Answer
The answer is the cost baseline. This is the correct choice because the cost baseline is the approved, time-phased project budget against which actual cost performance is measured, directly providing the planned cost data needed for comparison. When a sponsor requests a report on planned vs. actual cost performance, the cost baseline supplies the budgeted cost of work scheduled (planned value), which is then compared to the actual costs from the project’s accounting system to calculate cost variance and the cost performance index. On the CompTIA Project+ PK0-005 exam, this question tests your understanding of key project documents and their specific purposes; a common trap is confusing the cost baseline with the project budget or the cost management plan, but remember the baseline is the approved reference for measuring performance. For a quick memory tip, think of the cost baseline as your “budgetary ruler”—it’s the fixed yardstick you hold up to see how far your actual spending has deviated from the plan.
This PK0-005 practice question tests your understanding of tools and documentation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A project sponsor asks for a report showing the planned vs. actual cost performance. Which project document contains the necessary data to create this report?
Stakeholder engagement plan
Why wrong: Communication plan, not cost data.
Requirements traceability matrix
Why wrong: RTM traces requirements, not costs.
Cost baseline
The cost baseline provides the planned spending against which actual costs are measured.
Work breakdown structure
Why wrong: WBS defines scope, not costs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cost baseline
The cost baseline is the approved version of the project budget, including contingency reserves, against which actual cost performance is measured. It provides the planned cost data (budgeted cost of work scheduled) and, when combined with actual cost data from the project's accounting system, enables the calculation of cost variance and cost performance index for the report. The sponsor's request for planned vs. actual cost performance directly requires the cost baseline as the reference document.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Stakeholder engagement plan
Why it's wrong here
Communication plan, not cost data.
Requirements traceability matrix
Why it's wrong here
RTM traces requirements, not costs.
Cost baseline
Why this is correct
The cost baseline provides the planned spending against which actual costs are measured.
Related concept
Read the scenario before looking for a memorised answer.
Work breakdown structure
Why it's wrong here
WBS defines scope, not costs.
Common exam traps
Cisco often tests the distinction between the WBS (scope decomposition) and the cost baseline (budget allocation), leading candidates to mistakenly select the WBS because it is a familiar document, even though it lacks the cost data needed for the report.
Detailed technical explanation
The cost baseline is typically displayed as an S-curve in the project management plan, showing cumulative planned value over time. Actual costs are tracked via the project's accounting system (e.g., labor hours, material costs) and compared to the baseline to compute earned value management (EVM) metrics like CV (Cost Variance = EV - AC) and CPI (Cost Performance Index = EV / AC). In real-world scenarios, a sponsor might request a monthly cost performance report that plots the baseline against actual costs to identify budget overruns early.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the PK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Tools and Documentation — This question tests Tools and Documentation — Read the scenario before looking for a memorised answer..
The correct answer is: Cost baseline — The cost baseline is the approved version of the project budget, including contingency reserves, against which actual cost performance is measured. It provides the planned cost data (budgeted cost of work scheduled) and, when combined with actual cost data from the project's accounting system, enables the calculation of cost variance and cost performance index for the report. The sponsor's request for planned vs. actual cost performance directly requires the cost baseline as the reference document.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This PK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PK0-005 exam.
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