Fishbone diagram

A visual root-cause analysis tool that shows a stated problem at the head and organizes possible causes along branching 'bones' by category, allowing the team to drill down into sub-causes; also known as a cause and effect diagram.

Key Points

  • Clarifies the relationship between an effect (problem) and potential causes grouped by category.
  • Built through facilitated brainstorming; teams ask "why" repeatedly to add deeper sub-causes.
  • Typical categories include Methods, People, Materials, Equipment/Technology, Environment, and Measurement (adapt as needed).
  • Supports problem exploration; findings should be validated with data before selecting corrective actions.

Example

During Control Quality on a software project, the team faces recurring login failures. The project manager leads a fishbone (cause and effect) session. Categories include People, Process, Tools, Environment, and Requirements. The team maps sub-causes such as ambiguous acceptance criteria, flaky test environment, missing input validation, and skipped peer reviews. These insights guide targeted experiments and fixes.

PMP Example Question

During a quality review, a project team wants to structure and brainstorm potential reasons for a persistent defect before running experiments. Which tool should the project manager use?

  1. Pareto chart
  2. Fishbone diagram (cause and effect diagram)
  3. Control chart
  4. Scatter diagram

Correct Answer: B — Fishbone diagram (cause and effect diagram)

Explanation: A fishbone diagram is used to brainstorm and organize possible causes of a problem by category before validating them with data.

Advanced Project Management — Measuring Project Performance

Move beyond guesswork and status reporting. This course helps you measure real progress, spot problems early, and make confident decisions using proven project performance techniques. If you manage complex projects and want clearer visibility and control, this course is built for you.

This is not abstract theory. You’ll work step by step through Earned Value Management (EVM), learning how cost, schedule, and scope come together to show true performance. You’ll build a solid foundation in EVM concepts, understand why formulas work, and learn how performance data actually supports leadership decisions.

You’ll master Work Breakdown Structures (WBS), control accounts, and budget baselines, then apply core EVM metrics like EAC, TCPI, and variance analysis. Through a detailed real-world example, you’ll forecast outcomes, analyze trends, and understand contingencies and management reserves with confidence.

Learn how experienced project managers monitor performance, communicate results clearly, and take corrective action before projects slip. With practical exercises and hands-on analysis, you’ll be ready to apply EVM immediately. Enroll now and start managing performance with clarity and control.



Take Control of Project Performance!

HK School of Management helps you go beyond status reports and gut feelings. In this advanced course, you’ll master Earned Value Management (EVM) to objectively measure progress, forecast outcomes, and take corrective action with confidence. Learn how WBS quality drives performance, how control accounts really work, and how to use EAC, TCPI, and variance analysis to make smarter decisions—before projects drift off track. Built around real-world examples and hands-on exercises, this course gives you practical tools you can apply immediately. Backed by our 30-day money-back guarantee—low risk, high impact for serious project professionals.

Learn More