Quick Answer
The answer is earned value management (EVM), the correct cost control technique for keeping expenses within a tight budget on a firewall upgrade project. EVM is the right choice because it integrates scope, schedule, and cost data into objective metrics like the Cost Performance Index (CPI) and Schedule Performance Index (SPI), allowing you to compare planned value (PV), earned value (EV), and actual cost (AC) to detect cost overruns early. On the CompTIA Project+ PK0-005 exam, this question tests your understanding that EVM is the only technique that simultaneously tracks cost and schedule performance, making it ideal for budget-constrained projects with multiple branch offices. A common trap is confusing EVM with simpler variance analysis, but EVM provides a forward-looking performance index, not just a historical difference. Memory tip: EVM stands for “Earned Value Measures” — if you can measure what you’ve earned against what you’ve spent, you’ll never blow the budget.
This PK0-005 practice question tests your understanding of basics of it infrastructure and it project management. 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 manager is assigned to upgrade the firewall for a company with multiple branch offices. The project charter has been approved, but the budget is tight. Which cost control technique should the project manager use to ensure expenses remain within budget?
Earned value management (EVM)
EVM provides objective metrics to compare planned vs actual costs.
Reserve analysis
Why wrong: Reserve analysis helps manage budget buffers, not track spending.
Bottom-up estimating
Why wrong: Bottom-up is a detailed estimation method, not a control technique.
Parametric modeling
Why wrong: Parametric uses statistical models for estimation, not ongoing control.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Earned value management (EVM)
Earned value management (EVM) is the correct technique because it integrates scope, schedule, and cost data to provide objective performance metrics (e.g., Cost Performance Index, Schedule Performance Index) that allow the project manager to continuously monitor and control expenses against the approved budget. For a firewall upgrade with multiple branch offices, EVM helps detect cost overruns early by comparing planned value (PV), earned value (EV), and actual cost (AC), enabling corrective actions before the tight budget is exceeded.
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.
Earned value management (EVM)
Why this is correct
EVM provides objective metrics to compare planned vs actual costs.
Related concept
Read the scenario before looking for a memorised answer.
Reserve analysis
Why it's wrong here
Reserve analysis helps manage budget buffers, not track spending.
Bottom-up estimating
Why it's wrong here
Bottom-up is a detailed estimation method, not a control technique.
Parametric modeling
Why it's wrong here
Parametric uses statistical models for estimation, not ongoing control.
Common exam traps
The trap here is that candidates confuse cost control techniques (used during monitoring and controlling) with cost estimation techniques (used during planning), leading them to select bottom-up estimating or parametric modeling instead of EVM.
Detailed technical explanation
EVM relies on three key data points: Planned Value (PV) — the authorized budget for scheduled work; Earned Value (EV) — the budgeted cost of work actually performed; and Actual Cost (AC) — the total cost incurred. The Cost Performance Index (CPI = EV/AC) indicates cost efficiency; a CPI below 1.0 signals a cost overrun. For a multi-site firewall upgrade, EVM can track costs per branch, revealing if one site’s deployment is consuming more budget than planned, allowing the project manager to reallocate resources or adjust scope before the overall budget is breached.
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
Basics of IT Infrastructure and IT Project Management — This question tests Basics of IT Infrastructure and IT Project Management — Read the scenario before looking for a memorised answer..
The correct answer is: Earned value management (EVM) — Earned value management (EVM) is the correct technique because it integrates scope, schedule, and cost data to provide objective performance metrics (e.g., Cost Performance Index, Schedule Performance Index) that allow the project manager to continuously monitor and control expenses against the approved budget. For a firewall upgrade with multiple branch offices, EVM helps detect cost overruns early by comparing planned value (PV), earned value (EV), and actual cost (AC), enabling corrective actions before the tight budget is exceeded.
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
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