Quick Answer
The answer is the cause-and-effect diagram, also known as a fishbone or Ishikawa diagram, and the control chart. These two tools are correct for quality management because the cause-and-effect diagram systematically identifies and visualizes potential root causes of defects, linking an effect to its contributing factors, while the control chart monitors process stability over time by plotting data against control limits to detect variations. On the CompTIA Project+ PK0-005 exam, this pairing tests your ability to distinguish between proactive quality planning tools (like the fishbone diagram) and ongoing quality control tools (like the control chart). A common trap is confusing the control chart with a histogram or flowchart, but remember: a control chart tracks performance trends, not just frequency. For the memory tip, think “Fishbone finds the why, control chart watches the fly”—the fishbone digs into causes, and the control chart keeps an eye on process behavior.
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.
Which TWO tools are used for quality management in a project?
RACI matrix
Why wrong: RACI matrix clarifies roles, not quality.
Cause-and-effect diagram
Cause-and-effect diagrams help identify root causes of quality problems.
Control chart
Control charts track process variation and are used in quality management.
Network diagram
Why wrong: Network diagrams show task dependencies, not quality.
Gantt chart
Why wrong: Gantt charts are for scheduling, not quality management.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cause-and-effect diagram
The cause-and-effect diagram (also known as a fishbone or Ishikawa diagram) is a quality management tool used to identify, explore, and graphically display the potential root causes of a problem or quality defect. It helps project teams systematically analyze the relationship between an effect (the problem) and its possible causes, making it a core tool in quality planning and quality assurance.
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.
RACI matrix
Why it's wrong here
RACI matrix clarifies roles, not quality.
Cause-and-effect diagram
Why this is correct
Cause-and-effect diagrams help identify root causes of quality problems.
Related concept
Read the scenario before looking for a memorised answer.
Control chart
Why this is correct
Control charts track process variation and are used in quality management.
Related concept
Read the scenario before looking for a memorised answer.
Network diagram
Why it's wrong here
Network diagrams show task dependencies, not quality.
Gantt chart
Why it's wrong here
Gantt charts are for scheduling, not quality management.
Common exam traps
The trap here is that candidates often confuse project management process groups (e.g., planning vs. monitoring/controlling) and incorrectly select scheduling tools like the Gantt chart or network diagram as quality management tools, when they belong to time management and schedule control, not quality control or assurance.
Trap categories for this question
Command / output trap
Network diagrams show task dependencies, not quality.
Detailed technical explanation
A control chart is a statistical process control (SPC) tool that plots data points over time against upper and lower control limits (UCL/LCL), typically set at ±3 sigma from the mean. It distinguishes between common cause variation (inherent to the process) and special cause variation (assignable), enabling project teams to monitor process stability and detect trends or shifts early. In a real-world scenario, a control chart on defect rates during software testing can trigger corrective action if a point falls outside control limits, preventing quality degradation.
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: Cause-and-effect diagram — The cause-and-effect diagram (also known as a fishbone or Ishikawa diagram) is a quality management tool used to identify, explore, and graphically display the potential root causes of a problem or quality defect. It helps project teams systematically analyze the relationship between an effect (the problem) and its possible causes, making it a core tool in quality planning and quality assurance.
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 11, 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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