Introduction to Analyze Phase

analyze phase

Once you’ve successfully completed the Define and Measure phases of Six Sigma, it’s time to move on to the Analyze phase. The Analyze phase is a critical step in the overall Six Sigma DMAIC process. In fact, its importance lies in its ability to delve deep into data-driven analysis to identify the root causes of problems and pave the way for effective decision-making. Further, this phase follows the Define and Measure phases and precedes the Improve and Control phases, completing the DMAIC methodology of Six Sigma. Let’s explore the significance of the Analyze phase and its contributions to project success and organizational goals:

Key objectives and activities of the Analyze phase:

  1. Data Analysis: Review and analyze the data collected during the Measure phase. This includes plotting charts, conducting statistical analyses, and identifying patterns and trends to understand the current state of the process.

  2. Root Cause Analysis: Use various tools and techniques, such as Fishbone diagrams (Ishikawa diagrams), 5 Whys, Pareto charts, and scatter plots, to identify the primary factors contributing to the problem. The goal is to get to the root cause, not just address symptoms.

  3. Process Mapping: Create process maps to visualize the current process flow. This helps in identifying bottlenecks, inefficiencies, and areas for improvement.

  4. Data Validation: Ensure the accuracy and reliability of the data used for analysis. Validation is crucial to prevent making decisions based on faulty information.

  5. Hypothesis Testing: If applicable, conduct hypothesis testing to validate assumptions and test potential solutions. This helps in understanding whether changes made during the Improve phase are statistically significant.

  6. Identify Improvement Opportunities: Based on the findings from the data analysis and root cause analysis, identify potential improvement opportunities. These opportunities should directly address the root causes of the problem.

  7. Risk Analysis: Assess potential risks associated with implementing specific solutions and ensure risk mitigation strategies are in place.

  8. Cost-Benefit Analysis: Evaluate the potential benefits of implementing the identified improvements against the cost of implementation. This is crucial for decision-making and prioritization.

  9. Brainstorming Solutions: Engage the team in brainstorming sessions to generate possible solutions and interventions for the identified improvement opportunities.

  10. Interpretation of Results: Present the findings of the data analysis and root cause analysis to stakeholders in a clear and concise manner. Effective communication of the results is essential for garnering support for the improvement efforts.


Throughout the Analyze phase, it’s essential to keep the focus on data-driven decision-making. Make use of the tools and methodologies at your disposal to make informed choices about the best ways to improve the process and achieve the project’s objectives. Remember to involve all relevant stakeholders and maintain open lines of communication to ensure everyone is on board with the proposed changes.

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