PK0-005 Tools and Documentation Practice Question
A project has a BAC of $500,000 and a CPI of 0.8. What is the estimate at completion (EAC) assuming the current cost performance will continue?
⚠ Common exam trap
PK0-005 often tests EVM formula selection, and candidates confuse EAC = BAC / CPI with EAC = AC + (BAC - EV) — the key is the phrase 'current cost performance will continue,' which signals the CPI-based formula.
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
✓
$625,000
The Estimate at Completion (EAC) using the formula EAC = BAC / CPI, which assumes current cost performance continues, is calculated as $500,000 / 0.8 = $625,000. A CPI of 0.8 means the project is getting $0.80 of work for every $1.00 spent, so the total cost will be higher than the budget. Dividing the BAC by the CPI projects the final cost based on the current burn rate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
$500,000
Why it's wrong here
A $500,000 EAC simply restates the budget at completion, ignoring the CPI of 0.8 entirely. Dividing BAC by CPI yields $625,000, since costs are running 25% over budget. Restating the BAC would only be valid if the project were performing exactly to plan, with a CPI of 1.0.
- ✓
$625,000
Why this is correct
Dividing the budget at completion by the cost performance index ($500,000 ÷ 0.8) yields $625,000, because a CPI below 1.0 signals costs are running above plan. This satisfies the stem's assumption that current cost performance continues, making it the valid estimate at completion.
- ✗
$1,000,000
Why it's wrong here
Dividing BAC by CPI gives $500,000 ÷ 0.8 = $625,000, not $1,000,000. This figure would only arise from a CPI of 0.5, so it misapplies the formula's divisor rather than reflecting the stated cost performance.
- ✗
$400,000
Why it's wrong here
Dividing BAC by CPI gives $625,000, not $400,000; $400,000 is simply BAC multiplied by 0.8, which reverses the formula. That figure would represent the budget remaining if spending were running 20% under budget, so it tempts candidates who misread CPI as favourable rather than the cost overrun this scenario describes.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.