CompTIA PK0-005 - CompTIA Project+ Certification (2026)

A business case provides justification for undertaking a project, programme or portfolio. It evaluates the benefit, cost and risk of alternative options and provides a rationale for the preferred solution. A business case is essential for demonstrating the value of the project and securing the approval and funding from the governance. A business case is different from a scope statement, which defines the project boundaries and deliverables; a sponsor request, which initiates the project idea and seeks support; and a project charter, which authorizes the project and assigns the project manager. References = CompTIA Project+ PK0-005 Certification Study Guide, Chapter 3: Initiating Projects; What is business case? | APM

This answer is based on the best practice of choosing a project management methodology that suits the project characteristics and environment12. Scrum is an agile framework that is designed to handle complex and uncertain projects with frequent changes and tight deadlines34. Scrum involves a small, cross-functional team that works in short iterations called sprints, delivering incremental and potentially shippable products at the end of each sprint5. Scrum also allows for continuous feedback and improvement through daily stand-up meetings, sprint reviews, and retrospectives6. Scrum is suitable for this project because it can accommodate the high uncertainty, the risk of requirement changes, and the tight deadlines, while also enabling the two developers to collaborate effectively and deliver value to the customer. References = CompTIA Project+ Certification Study Guide7, CompTIA Project+ Certification Exam Objectives8, Project Management Methodologies Comparison (11 PM Methods)6, Project Management Methodologies: 12 Best Frameworks [2023]7, What is Scrum?5, Scrum Methodology: The Ultimate Guide6

A rollback plan is used when an issue is identified during testing or implementation. It allows the team to revert to the previous state, removing the new package. This aligns with CompTIA Project+ guidance on implementing fallback strategies for risk management.

When scope changes occur, proper change management is critical. The engineer must submit the change for formal approval before moving forward. Skipping approval would violate governance processes and may introduce compliance or contractual risks.

Time and materials contracts are flexible and beneficial when the project scope has many unknowns. They allow costs to be adjusted based on actual time and resources used, which is consistent with CompTIA Project+ recommendations for projects with uncertain requirements.

When the team is confused about what must be accomplished, the best method is formal written communication so expectations are clear, consistent, and unambiguous, and there is a single reference point everyone can review. Formal written communication (e.g., documented assignments, acceptance criteria, task descriptions, action items with owners and due dates) reduces interpretation differences that often happen in scattered individual messages. CompTIA Project+ covers communication methods and emphasizes selecting the right channel based on complexity and the need for clarity, traceability, and shared understanding. ()

Informal internal messages can be fast, but they are more likely to create inconsistent interpretation, especially if people receive different versions or lack context. Asynchronous verbal methods (like voicemail) are harder to reference and can increase misunderstanding. “Synchronous external” is the wrong audience and doesn’t solve internal task clarity.

A practical implementation is: publish tasks in the team’s system of record (ticketing tool/task board), write clear “definition of done” and acceptance criteria, capture decisions and action items in meeting notes, and ensure each task has a single owner. That approach aligns with Project+ expectations for structured communication, documentation, and accountability. ()

A warranty period is the time during which a manufacturer or seller agrees to repair or replace a product that is defective or does not meet the specified standards. A warranty period can be expressed in terms of duration (e.g., one year) or usage (e.g., 10,000 miles). A warranty period is a form of consumer protection that obliges the manufacturer or seller to bear the costs of repairing or changing any part of the product that is not functioning properly1.

When an organization lacks the internal resources or expertise to develop a specific feature, subcontracting is an effective procurement method. This involves hiring an external entity to perform the work, thereby filling the skill gap.

The CompTIA Project+ PK0-005 exam objectives, under Domain 1.11: Explain important project procurement and vendor selection concepts, list subcontracting as a procurement method:

"Resource procurement methods: Build, Buy, Lease, Subscription/pay-as-you-go."

CompTIA Project+ PK0-005 Exam Objectives

Subcontracting falls under the 'Buy' category, where services are procured externally to meet project requirements.

ROI (return on investment) is a business-case concept used to evaluate whether the benefits/value of a project justify the investment. In CompTIA Project+ (PK0-005) objectives, ROI is explicitly referenced under “Business case or business objective – Return on investment (ROI)” as an artifact used during the discovery/concept and initiation work to support approval decisions.

Option C best matches that need because it focuses on the value the project will bring after the investment (benefits/returns). This value description is what the sponsor compares against the project’s expected costs to judge attractiveness and prioritize investments.

Option A (current vs desired outcome) can help define the problem and target state, but it isn’t ROI itself. Option B describes procurement documentation such as a statement of work/contract-style responsibilities, which is not the sponsor’s ROI input. Option D focuses on operational costs (OpEx) in normal operations; while OpEx may be part of the financial picture, ROI is specifically about investment return, not just “normal operations” cost analysis.