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Decision Making and Problem Solving · 3 min read

When and How to Use the Five Whys Technique

Discover how the improved Five Whys technique examines natural law, material, design and intent, so you reach the root cause and prevent repeat faults.

Chris Farmer, Founder of Corporate Coach Group

“Asking 'why?' five times digs below surface blame, yet true root cause sits in five linked layers: natural law, material, design, trigger and human intent. Use this improved Five Whys technique and you spot hidden links, stop repeat faults and guide better action in work and life.”

Chris Farmer — Founder, Corporate Coach Group

When and How to Use the Five Whys Technique

When and How to Use the Five Whys Technique

Definition: The Five Whys Technique is a method of problem solving, which is based upon asking WHY? five consecutive times, in an attempt to understand the root cause of an event.

A visual example of The Five Ways Technique:

Using the Five Whys Technique causes people to look deeper than the immediate causes for an event and encourages finding the root causes.

A root cause could be the cause of many problems, which on the surface are different, but are manifestations of a single fault.

The Five Whys Technique is faulty, because it provides only a single train of thought which is not sufficient to give a full causal explanation, since all events have multiple causes.

Improved Five Whys Technique

Here at Corporate Coach Group, we have an improved version of the Five Whys Technique. Visually it looks like this:

The Corporate Coach Group's Improved Five Whys

1. Universal Natural Law.

Everything and every event is governed by a set of Universal Natural Laws. Events may be explained by reference to these laws, ie the Titanic sank because of the Universal Laws that govern buoyancy, (Archimedes principles) which dictate that ships made of iron are eminently sinkable.

2. Material cause.

Material causes are those which reference the failure of the materials being used. (We don't use chocolate to make teapots!)

3. Formal cause.

Formal causes are those which reference design errors, as the cause of an event. (The Titanic sank partly because the watertight bulkheads were too shallow).

4. Efficient cause.

Efficient causes are those which reference the obvious trigger for the event under question. (The man died because he was shot in the heart by the murderer).

5. Final cause.

Final causes are those which reference human intentions as the cause of an event. (For example, the man was murdered because the thief wanted his money).

How to use the Improved Five Whys Technique

1. Write down the event and start with the most obvious explanation, which is the "efficient cause", which is the obvious trigger that caused the event. For the Twin Towers disaster, the obvious cause is the aeroplanes crashing into the Towers.

2. Then, if the event was caused by human action or neglect, then identify the "final causes". Write down those human decisions and goals, which contributed to the event and ask yourself, what aims were the participants attempting to actualise? For the Twin Towers, the causes would include the religiously motivated intentions of the hijackers.

3. Then look at "formal causes" which are the design errors or failures, that contributed to the event. Look for faulty designs and list them as potential causes. For the Twin Towers, the design of the Towers did not include any considerations for the eventuality of a fully-fuelled passenger jet crashing into it.

4. Then look for "material causes", which are the materials that were in use, and which may have contributed to the event. For the Twin Towers, the material causes may have included the "ties" that held the steel structure together, and which melted under the intense heat of the fire. Could other materials have been better suited to the task?

5. Universal Laws of Nature. There are universal laws of nature that govern everything, one of which is, "for every action, there is an equal and opposite reaction". The Americans have been at war with Muslim countries since the first Gulf war in 1991. Since every action, creates an equal and opposite reaction, then America's attack on Muslim countries, may be considered one of the causes of a Muslim attack on America.

Next time you have a problem, try using the Improved Five Whys Technique. You may be surprised what the five whys analysis will reveal to you.

Improved Five Whys Technique

In business, the Improved Five Whys Technique is a problem solving method that 1) studies five cause levels – natural law, material, design, trigger and human aim; 2) asks “why” at least five times to reach each level; 3) follows more than one path so thinking is not stuck on a single line; and 4) ends with clear actions that stop the fault coming back.

CG4D Definition

Context: Business
Genus: Problem solving method

  • Studies five cause levels – natural law, material, design, trigger and human aim
  • Asks “why” at least five times to reach each level
  • Follows more than one path so thinking is not stuck on a single line
  • Ends with clear actions that stop the fault coming back

Article Summary

Asking 'why?' five times digs below surface blame, yet true root cause sits in five linked layers: natural law, material, design, trigger and human intent. Use this improved Five Whys technique and you spot hidden links, stop repeat faults and guide better action in work and life.

Chris Farmer, Founder of Corporate Coach Group

Written by Chris Farmer

Founder & Lead Trainer, Corporate Coach Group

Chris Farmer is the founder of the Corporate Coach Group and has over 25 years experience designing and delivering leadership and management training across both the public and private sectors. His programmes are structured, practical and built around real-world performance. Read more about Chris and the story of how the Corporate Coach Group was founded.

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Key Statistics

A 2024 BSI survey of 600 UK manufacturing plants found that firms that used a structured Five Whys session after each breakdown cut repeat faults by 37% within one year.

Gartner projects that by 2025, 70% of large companies will include a formal root cause analysis stage in every high-impact incident review, up from 45% in 2021.

Frequently Asked Questions

Common questions about this topic

The Five Whys technique helps you move past surface blame by asking “why” five times to expose the true root cause.
Traditional Five Whys follows one line of thought, so it can miss other causes and give a shallow root cause analysis.
They are universal natural law, material, formal, efficient and final causes; together they give a fuller root cause analysis.
Material cause looks at the parts or substances that failed; formal cause studies faults in the design or structure.
Stop when each of the five levels has a clear, testable answer and further asking “why” only repeats what you know.
Natural laws, like physics or market force rules, set limits on what can happen, so ignoring them keeps problems coming back.
Write the problem plainly, then record the obvious trigger-the efficient cause-before moving down the other four cause levels.

Thought of something that has not been answered? Ask us today.

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