Jun 11, 2026

Root Cause Analysis Tools: Types, Uses and Examples

Everyone runs into problems at some point. Most of all when you are running a business. You may apply patches that temporarily resolve the symptoms, but in order to completely rid yourself of the problem, you have to identify the root cause behind it.

For example, you often experience heartburn and use over-the-counter medicines to temporarily cure its symptoms. But on consulting a doctor, you find out that smoking cigarettes is the cause behind heartburn, and quitting will also solve the problem of heartburn.

Similarly, you can experience a problem in your organization that affects its operations and profitability. Rather than addressing the effects of the issue, it is better to utilise root cause analysis tools to find and eliminate its underlying reason.

In this article, we learn what root cause analysis is and some common root cause analysis techniques used by organizations to identify and address problems.

What is Root Cause Analysis?

Root cause analysis (RCA) identifies and addresses the underlying causes behind problems faced by your organization rather than treating their symptoms.

Root cause analysis aims to understand why something occurred and determine the best possible solution that would effectively prevent the problem from recurring.

What is the Process of Root Cause Analysis?

Before we cover the tools to perform RCA, it’s better to understand the process that guides their use. This is what a root cause analysis process looks like:

What is the Process of Root Cause Analysis?

1. Identifying the Problem

The first step in root cause analysis is to find issues that affect production in your organization. The aim is to create a problem statement that gives a clear account of the issue, the area it affects, its symptoms, and the goals you wish to achieve in resolving it.

2. Collecting Data

To best understand a problem, you have to gather as many details about it as possible. Involve all your employees, teams, and stakeholders to gather different perspectives on the problem. The data you collect must answer:

The duration of the problem
Proof of the problem
Its impact on the business

3. Conduct Root Cause Analysis

Once you have identified the problem and collected all the relevant data, you conduct the root cause analysis. The tool you use can be determined by the scale and complexity of the problem.

For a simple problem like equipment failure, you can use the 5 whys technique, while for a complex problem like delays in production, where multiple factors can cause the issues, you can use the Ishikawa diagram.

4. Implement Corrective Actions

Finding the root cause of a problem is not sufficient. You also have to implement corrective action plans to prevent the recurrence of the problem. A corrective action plan may include making changes in risk mitigation strategies, improving employee training, or replacing old machinery.

Root Cause Analysis Tools and Techniques

There are various root cause analysis methods for solving business problems. Tools and techniques for root cause analysis aim to identify the cause behind the problem in your organization.

Depending on the scale of the issue and your organization’s industry, you can use one or a mix of the following RCA tools:

Root Cause Analysis Tools and Techniques

1. 5 Whys Analysis

5 Whys is a simple yet effective way of identifying the root cause behind a problem. You start with a problem statement and ask why. Each successive “why” reveals the layers behind a problem.

The 5 Whys technique is used for issues with linear cause-and-effect, where asking 'why' 5 times is sufficient to determine the cause of a problem.

5 Whys analysis example

Problem statement: A machine stopped working

1. Why? The machine was overheated

2. Why? Its cooling system stopped working

3. Why? The cooling system had an insufficient level of coolant

4. Why? There was a leak in the coolant storage

5. Why? The maintenance checks were skipped

Root cause: the machine stopped working due to faulty maintenance procedures.

2. Ishikawa Diagram

The Ishikawa diagram, or the fishbone diagram, is a visual method of determining the root cause of a problem. The head of the fish represents the main problem or effect, while the bones branching off from the spine represent the categories of causes.

Major categories of causes include people, methods, machines, materials, measurements and environments. These categories can also vary depending on the problem.

The major use case of the Ishikawa diagram is to pinpoint the root cause of complex problems, where more than one factor can contribute to the issues.

Ishikawa Diagram Example

Head (Problem): Complaints about the late delivery of products

Bones (causes):

1. People

Driver shortage
Improper staff training

2. Methods

Poor inventory management
Inefficient delivery schedule

3. Machines

Frequent breakdown of the delivery vehicle
Outdated route optimization software

4. Materials

Incorrect packaging
Delays caused by missing items

5. Measurements

Inaccurate delivery time estimates

6. Environments

Bad weather
Traffic jams

3. Failure Mode and Effects Analysis (FMEA)

Failure mode and effects analysis takes a proactive approach to root cause analysis. This RCA technique identifies potential breakdowns or failure modes and analyses their effect on business operations.

The FMEA is used to detect possible failures in manufacturing or assembly processes, product design or service.

For each step, it scores the severity (S), occurrence (O) and detection (D) rates, which are helpful in calculating the risk priority number (RPN). RPN is used by management to determine the order in which to mitigate risks.

Failure Mode and Effects Analysis (FMEA) example

Process: Assembling a battery-operated toy car

Assembly Step	Failure mode	Effect	Cause	Severity (S)	Occurrence (O)	Detection (D)	RPN
Battery installation	Battery not connected	The toy car does not start	Loose contact	8	4	3	96
Wheel fitting	Wheels not properly attached	Difficulty in moving the toy	Improper fitting	9	4	4	144
Body assembly	Alignment issue in body parts	Poor appearance of the toy	Operator error	6	3	7	126

Highest RPN: 144 for wheel fitting. This issue would be prioritized by management.

Summing Up

With risks abound in an organization, it is only natural that management has plans in place to find and resolve problems before they disrupt operations. An effective method would be to incorporate a Quality management Software, such as Effivity, that can automatically identify process deviations, conduct root cause analysis, and help you implement corrective action plans.

Effivity’s QMS provides a uniform platform that helps in compliance with multiple standards, such as ISO, IATF, GMP, etc. It fits every business size and automates governance, risks, maintenance, calibration, documented information, customer complaints, training, etc.

Book a free trial with Effivity now and simplify root cause analysis and more!

Kaushal Sutaria

Managing Director at Effivity Technologies

Kaushal Sutaria is an expert in strategic business management and an entrepreneur behind three global companies. His latest venture, Effivity Technologies, simplifies ISO standard compliance with innovative automation. Kaushal's dedication to best practices and mentorship has earned him clients in over 50 countries.

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