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Matrix Diagrams

A quality analysis tool that arranges information in a row-and-column grid to examine how items relate to each other. It makes the strength or weakness of connections among factors, causes, and objectives visible within the matrix structure.

Key Points

  • Displays relationships among two or more sets of items using a matrix layout.
  • Indicates relationship strength (for example: strong, moderate, weak) with symbols, numbers, or weights.
  • Common forms include L, T, Y, X, C, and roof matrices, chosen based on how many groups are being compared.
  • Helps prioritize work, reveal gaps, and assign ownership by clarifying where connections are strongest or missing.

Example

A project team maps customer requirements (rows) against proposed product features (columns). They mark strong links with a 9, moderate with a 3, and weak with a 1. The highest row totals show which features most strongly satisfy customer needs, guiding design priorities and trade-off discussions.

PMP Example Question

Which tool should a project manager use to assess how strongly product features address specific customer needs by showing relationship strength across rows and columns?

  1. Affinity diagram
  2. Matrix diagram
  3. Scatter diagram
  4. Control chart

Correct Answer: B — Matrix diagram

Explanation: A matrix diagram displays the strength of relationships between two or more groups of items in a structured grid, making it ideal for evaluating how well features satisfy requirements.

ICS/OT Cybersecurity Fundamentals — Security Built for Industrial Systems

Industrial control systems cannot be secured like ordinary IT. A forced reboot, aggressive scan, or incompatible patch can interrupt production and create real safety consequences. Effective OT security begins with understanding the systems, constraints, and risks unique to industrial environments.

This course gives IT professionals, engineers, operators, and security practitioners a practical foundation in ICS threats, zone and conduit design, risk assessment, passive asset visibility, and vendor evaluation. You will learn how IEC 62443, NIST CSF, and MITRE ATT&CK for ICS apply where availability and safety come first.

Eight reconstructed incidents—including Stuxnet, Triton, Ukraine 2015, Colonial Pipeline, and PIPEDREAM—show how attackers move through OT environments, what they target, and which defenses could have changed the outcome.

Watch the course preview, then build the vocabulary, frameworks, and judgment needed to take credible first steps in ICS/OT cybersecurity.

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