Examples

5 whys
This 5 Whys example is often used during our Lean Six Sigma workshops. Notice the difference between the assumed cause and the root cause.
5 whys
In this example, a team used the 5 Whys approach to determine the reason behind a customer complaint about the delayed test results at a laboratory. Only four Whys were required to get to what looks to be the root cause.
5 whys
This is an example that uses the 5 Whys approach to answer a concern during a Lean Six Sigma workshop. Note that you can carry on asking Why and ask, “why doesn’t maintenance department have a schedule for routine activities?”.
5 whys
5 Whys can be done in a team setting or on an individual basis. This is an example of a template that you can use to record your 5 Whys analysis.
How-How Diagram — Tree Diagram
This example illustrates the use of the how-how analysis technique to identify ways to reduce the amount of energy used in a production plant.
How-How Diagram — Tree Diagram
This is an example that illustrates the use of the how-how analysis technique to identify ways to achieve the goal of reducing spoilage in a manufacturing business.
A3 Thinking — PDCA
This is an example of a template that can be used to manage your problem solving efforts using the A3 approach.
PDCA
A common example often used to illustrate the PDCA cycle is when a team is initiating a new product development.
PDCA
This is an example of a PDCA cycle where a lab team has planned to solve a customer’s complaint about the delayed test results.
Fishbone Diagram
The example shown here is the output of a brainstorming session on the causes of the increased invoice errors for a particular company. Note that this fishbone diagram is labeled with the 6 Ms.
Fishbone Diagram
The example shown here is the output of a brainstorming session on causes of the increased coolant consumption in a manufacturing plant. Note that this fishbone diagram is labeled with the 6 Ms.
Fishbone Diagram — Root Cause Analysis — 5 Whys
A restaurant manager has noticed an increase in the number of customer complaints regarding the taste of the coffee they make. His team has constructed a fishbone diagram and added the possible causes for only two categories.
Pareto Analysis
A factory team has collected data to address the rising number of customer complaints. The Pareto chart has further been analyzed and the main categories where specific problems occur most often have been sub-categorized.
Pareto Analysis
A team in a hospital has collected data to study the increased number of call bell usage by patients in order to improve nursing services.
Pareto Analysis
A factory team has collected data and prepared the following Pareto charts to address the rising number of customer complaints in a way management can understand.

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