top of page

Root Cause Analysis Tools

What Is Root Cause Analysis?

Root cause analysis (RCA) is a problem-solving technique used to identify and address the underlying causes of an issue or problem rather than just treating the symptoms. It aims to uncover the fundamental reason or "root cause" that led to the occurrence of the problem.

The goal of conducting a root cause analysis is to prevent the problem from recurring by addressing its underlying causes, rather than simply addressing the immediate symptoms or manifestations of the problem. By identifying the root cause, organizations can implement targeted solutions that effectively eliminate or mitigate the issue.

Where Is Root Cause Analysis Used?

RCA is widely used in manufacturing industries to identify the root causes of product defects, production delays, equipment failures, and quality issues. In the healthcare industry, root cause analysis is utilized to investigate adverse events, medical errors, patient safety incidents, and near misses. RCA is employed in IT to diagnose and address issues related to system failures, network outages, software bugs, data breaches, and service disruptions. Project Management: Root cause analysis is used in project management to identify the reasons behind project failures, delays, or budget overruns.

Root cause analysis is employed in customer service to investigate customer complaints, identify the root causes of dissatisfaction, and implement corrective actions to improve customer experience. RCA is utilized in industries such as oil and gas, mining, transportation, and construction to investigate environmental incidents, accidents, and safety breaches. Root cause analysis is applied in process improvement initiatives to identify the causes of inefficiencies, bottlenecks, and errors in business processes. It helps organizations streamline their operations and enhance overall performance.

How to Perform a Root Cause Analysis

The process of root cause analysis typically involves the following steps:

1. Problem Identification

Clearly define the problem or issue that needs to be analyzed. This could be a safety incident, product defect, customer complaint, or any other undesired outcome.

2. Data Collection

Gather relevant data and information related to the problem. This may include incident reports, customer feedback, process data, and any other pertinent records.

3. Root Cause Identification

Analyze the data and apply various tools and techniques (such as the "5 Whys" method, cause and effect diagrams, or Pareto analysis to identify potential root causes. The goal is to dig deeper into the factors that contributed to the problem.

4. Root Cause Validation

Validate the identified root causes through further analysis, investigation, or testing. This step ensures that the root causes are accurate and supported by evidence.

5. Solutions Development

Once the root causes are confirmed, brainstorm and develop possible solutions or corrective actions that address those causes directly. It is important to focus on preventive measures rather than just treating the symptoms.

6. Implementation and Monitoring

Implement the selected solutions or corrective actions and monitor their effectiveness over time. This step ensures that the identified root causes are effectively addressed and that the problem does not recur.

Here are some additional considerations when doing a RCA:

  1. Select an appropriate team to conduct the root cause analysis.

  2. Team members should be selected from the area that is experiencing the problem. Other team members might include:

    1. The process manager who manages the process and will need to implement any recommendations.

2. An internal customer of the process exhibiting the problem and may be feeling the impact of the process problems.

  1. Six Sigma resources such as Green Belt (GB), Black Belt (BB), or Master Black Belt (MBB) if specialized improvement knowledge and tools are required.

  1. Focus is on defining and understanding the problem, brainstorming possible causes, analyzing causes and effects, and recommending solutions to the problem.

  2. The team should meet frequently.

  3. Depending on the complexity of the recommendations, it would be prudent to do a pilot of the recommendations to be sure they solve the problem as intended.

  4. The team should monitor and continue to follow the progress to be sure the desired outcomes are happening and if not, be prepared to do some revisions.

What are Root Cause Analysis (RCA) tools?

RCA can be accomplished by using two distinct approaches. The first uses traditional statistical analysis and tools. The second approach uses more subjective analysis and graphical tools. Statistical analysis is used to identify relevant process factors which are shown to have a statistically significant impact on the process problem you are trying to solve. Some of the common statistical tools that can be used to try and find differences and relationships are:

Hypothesis testing

Hypothesis testing is a statistical technique for making decisions about whether the problems in your process are a result of chance or a result of some specific factor. Some of the specific hypothesis tests might include:

● 1-sample t test

● 2-sample t test

● Analysis of Variance (ANOVA)

● Non-parametric tests


Regression analysis seeks to establish relationships between your input (X) and output (Y) variables to see if the relationship helps identify a potential root cause for your problem. Here are some of the common regression techniques used for RCA:

● Simple linear regression

● Multiple regression

● Logistic regression

There are several RCA tools which are more subjective, intuitive, and graphical but are very useful in trying to identify possible root causes. Some of these are:

1. Pareto Chart - used to prioritize the possible causes of the problem in descending order of magnitude.

How To Use A Pareto Chart In Root Cause Analysis

Here's how you can use a Pareto chart for root cause analysis:

1. Clearly identify the problem or issue you want to analyze.

2. Identify the potential causes of the problem and categorize them into different groups.

3. Determine a measurement scale to quantify the frequency or impact of each cause.

4. Sort the causes in descending order based on their frequency or impact. Create a bar chart with the causes on the x-axis and the frequency or impact on the y-axis.

5. Examine the Pareto chart to identify the "vital few" causes that contribute to the majority of the problem.

6. Once you have identified the significant causes from the Pareto chart, apply appropriate root cause analysis techniques such as the "5 Whys" method or cause-and-effect analysis to investigate and understand the underlying reasons behind those causes.

7. Develop and implement targeted corrective actions or solutions that directly address the identified root causes.

Below is what a Pareto Chart will look like:

2. The 5 Whys - explores the hidden causes of the problem by repeatedly asking Why, approximately five times.

How To Use The 5 Whys In Root Cause Analysis

Here's how to use the 5 Whys method:

1. Clearly articulate the problem or issue you want to analyze.

2. Start by asking "Why did this problem occur?"

3. Collect responses or data that provide an explanation for the first "why" question. This answer will provide an initial cause or reason for the problem.

5. Collect responses or data to answer the second "why" question. This answer will represent a deeper cause or reason for the problem.

6. Continue asking "why" for each answer obtained in the previous step. Keep repeating the process until you reach a point where the answers are no longer productive or do not lead to further insights. Typically, this occurs after asking "why" five times.

7. Analyze the answers obtained from the iterative "why" questions.

8. Verify the identified root causes by gathering additional data or evidence.

9. Develop and implement targeted corrective actions or solutions that address the identified root causes.

3. Scatter Plot Diagram - graphical tool that illustrates whether there is a relationship between an input and output of a process.

How To Use A Scatter Plot Chart In Root Cause Analysis

Here's how to use a scatter plot for root cause analysis:

1. Clearly define the problem or issue you want to analyze and identify the two variables you suspect may be related.

2. Collect data for both variables from relevant sources. Ensure you have data points for each variable that correspond to the same observations or instances.

3. Determine which variable will be plotted on the x-axis and which variable will be plotted on the y-axis.

4. For each observation, plot a data point on the scatter plot. Place the data point at the intersection of the values of the two variables for that observation.

5. Examine the scatter plot to identify any patterns or trends between the variables.

6. Based on the scatter plot analysis, draw insights and conclusions about the potential relationship between the variables and their impact on the problem.

7. If a relationship or pattern is evident in the scatter plot, conduct further analysis to explore the causal relationship between the variables.

8. Validate the identified relationship by checking for consistency with other data or evidence.

9. Once you have identified potential root causes based on the scatter plot analysis, develop appropriate corrective actions or solutions to address those causes directly.

Below is what a Scatter Plot Diagram would look like:

4. Fishbone Diagram (Ishikawa Diagram/Cause and Effect Diagram) - used to identify various possible causes that led to the current problem.

How To Use A Fishbone Diagram In Root Cause Analysis

Here's how to use a fishbone diagram in root cause analysis:

1. Make sure the problem is specific and well-defined.

2. Start by drawing a horizontal line across the center of a piece of paper or whiteboard, representing the "spine" of the fishbone. At the end of the line, draw a horizontal arrowhead, resembling the head of a fish, pointing to the right.

3. Identify the main categories of potential causes related to the problem. These categories can vary depending on the nature of the problem but commonly include People, Process, Equipment, Materials, Environment, and Management. Draw angled lines, known as "bones," protruding from the spine towards the right side of the diagram. Label each bone with the corresponding category.

4. Brainstorm and identify potential causes within each category.

5. For each identified potential cause, ask "Why does this cause occur?" This helps in digging deeper and identifying underlying factors contributing to each potential cause.

6. Repeat the process of asking "why" for each subsequent answer obtained in the previous step.

7. Review the fishbone diagram and analyze the identified potential causes and their corresponding branches.

8. Try to get data to validate your potential causes.

9. Explore possible recommendations for eliminating the root causes.

Below is what a fishbone would look like:

5. Failure Mode and Effects Analysis (FMEA) - FMEA is used to identify potential problems and their possible causes BEFORE there is a problem whereas RCA is used to rectify a problem AFTER it has occured. FMEA is proactive while RCA is reactive.

6. Fault Tree Analysis - a systematic, graphical method used to analyze and understand the causes and effects of system failures.

How To Use A Fault Tree Analysis In Root Cause Analysis

The process of conducting a fault tree analysis typically involves the following steps:

1. Define the Top Event

2. Identify Contributing Events

3. Construct the Fault Tree

4. Assign Probabilities

5. Analyze the Fault Tree

6. Evaluate Risk and Mitigation Measures

7. 8D Report Template Checklist - is a structured document used to document the problem-solving process and actions taken in an 8D root cause analysis.

How To Use An 8D Report Template Checklist In Root Cause Analysis

Here is a general checklist of components typically included in an 8D report:

  1. Problem Description:

  2. Team Information:

  3. D1: Form a Team:

  4. D2: Describe the Problem:

  5. D3: Contain the Problem:

  6. D4: Identify the Root Cause:

  7. D5: Develop Corrective Actions:

  8. D6: Implement Corrective Actions:

  9. D7: Prevent Recurrence:

  10. D8: Recognize the Team and Closure:

8. DMAIC Template - While DMAIC is primarily focused on process improvement, it can also be utilized for root cause analysis by applying its structured approach to identifying and addressing the underlying causes of a problem.

How To Use A DMAIC Template In Root Cause Analysis

Steps of DMAIC

  1. Define the Problem.

  2. Measure and get a baseline of your process.

  3. Analyze and find the root causes of your problems.

  4. Improve and implement recommendations for eliminating your problems.

  5. Control and set up systems to maintain your gains.

9. Flow Chart - is a visual tool that represents a process or system using various shapes and arrows to show the flow of activities and decisions.

How To Use A Flow Chart in Root Cause Analysis

Here's how to use a flowchart for root cause analysis:

1. Identify the Problem

2. Determine the Scope

3. Identify the Steps and Events

4. Define Symbols and Shapes

5. Map the Flowchart

6. Analyze Decision Points

7. Add Supporting Information

8. Analyze Potential Causes

9. Validate and Verify

10. Identify Root Causes

Below is what a flow chart would look like:

The above root cause analysis tools are the most commonly used. Below are some additional software tools which can be used in specialized situations:

10. Quick Retrospective Template

This template can be customized based on your team's needs and the context of the retrospective. It provides a framework for capturing key points, fostering open communication, and driving continuous improvement within the team.

11. Intelex – Root Cause Analysis Software

Intelex software can be utilized for root cause analysis within their broader suite of EHSQ management solutions. While Intelex does not have a specific module dedicated solely to root cause analysis, their incident management and corrective action functionalities can be effectively used for conducting root cause analysis.

12. Apache SkyWalking

Apache SkyWalking is an open-source observability and application performance monitoring (APM) tool that can be used as part of the root cause analysis process. While it is not specifically designed for root cause analysis, it provides valuable insights and data that can aid in identifying and analyzing root causes of performance issues in distributed systems.

13. AppDynamics

AppDynamics is an application performance monitoring (APM) tool that can be effectively used for root cause analysis in complex and distributed environments. It provides comprehensive visibility into application performance, infrastructure, and user experience, helping to identify and resolve issues that impact application performance and availability.

14. TapRoot

TapRooT® is a systematic root cause analysis methodology and software tool used to investigate incidents, accidents, and quality issues in various industries.

15. Sologic’s Causelink

Sologic Causelink is a software tool and methodology specifically designed for root cause analysis (RCA). It provides a structured approach to investigating and understanding the underlying causes of incidents, problems, or failures.

What are the benefits of using RCA software?

By leveraging root cause analysis software, organizations can streamline the analysis process, improve accuracy and consistency, and make data-driven decisions to address the underlying causes of problems. It enhances collaboration, documentation, and knowledge sharing, leading to more effective problem-solving and preventive actions.

What is the simplest method to perform Root Cause Analysis?

The simplest method for root cause analysis is often the "5 Whys" technique. It is a straightforward and intuitive approach that involves repeatedly asking "why" to identify the underlying causes of a problem.

In What Steps Can Tools Be Used During a Root Cause Analysis?

Here are some steps where tools can be beneficial during a root cause analysis:

● Data Collection

● Documentation

● Cause Identification

● Data Analysis

● Collaboration and Communication

● Corrective Action Management

● Reporting and Documentation

Do Root Cause Analysis Tools Have Templates?

Yes, many root cause analysis tools provide templates as part of their features. Templates are pre-designed frameworks or structures that guide users through the root cause analysis process, ensuring that essential steps and considerations are addressed. These templates can help streamline the analysis, provide consistency, and ensure that important information is not overlooked.

What Is the Importance of the Tools of Root Cause Analysis?

Overall, root cause analysis tools enhance the efficiency, effectiveness, and consistency of the analysis process. They streamline data management, analysis, collaboration, and reporting, ultimately helping organizations identify and address the underlying causes of problems more efficiently and effectively.

How Do Tools of Root Cause Analysis Improve Work Efficiency?

By leveraging root cause analysis tools, teams can streamline workflows, save time, reduce manual effort, enhance collaboration, and make more informed decisions. The efficiency gained from using these tools allows organizations to conduct root cause analyses more effectively and address underlying issues promptly.

Which Sectors Can Benefit from the Use of Root Cause Analysis Tools?

Here are some sectors that can particularly benefit from the use of root cause analysis tools:

● Manufacturing

● Healthcare

● Energy and Utilities.

● Transportation and Logistics.

● Information Technology

● Construction and Engineering

● Environmental and Sustainability

● Financial Services

How to Learn More About Root Cause Analysis Tools

The following sites can be a good place to start learning more about RCA:

Most Frequently Asked Questions About the Tools of Root Cause Analysis

Which tool is most frequently used in root cause analysis?

There isn't a single tool that is universally considered the most frequently used in root cause analysis. The choice of tool depends on several factors, including the specific needs of the organization, the complexity of the problem, and the preferences of the analysts involved.

What is the easiest tool for root cause analysis?

While the 5 Whys technique is a straightforward tool, it is important to note that it may not always lead to the identification of the complete set of root causes. It is best suited for simple or straightforward problems and can serve as a starting point for deeper investigations using more comprehensive root cause analysis methods if needed.

What is the most basic approach to root cause analysis?

The most basic approach to root cause analysis involves asking "why" repeatedly to uncover the underlying causes of a problem. This approach is often referred to as the "5 Whys" technique. Here's a step-by-step breakdown of this basic approach:

1. Define the Problem

2. Ask "Why" the Problem Occurred

3. Ask "Why" Again

4. Repeat the Process

5. Identify the Root Cause(s)

4 views0 comments

Recent Posts

See All

Value Stream Map (VSM)

What Is a Value Stream Map? A Value Stream Map (VSM) is a lean management tool used to visually represent and analyze the flow of materials, information, and activities required to deliver a product o

Six Sigma White Belt

What is a Six Sigma White Belt? A Six Sigma White Belt is an entry-level certification in the Six Sigma methodology, which is a set of techniques and tools used for process improvement and reducing de

Six Sigma Certification

What Is Six Sigma Certification? Six Sigma certification is a professional credential that validates an individual's knowledge and expertise in implementing and managing the Six Sigma methodology. Six


Tel: 404.793.0778

bottom of page