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Bonnie Stone


Drive Efficiency in Your Process

Five critical lean tools

Published: Wednesday, November 29, 2017 - 12:01

Lean, also known as “lean manufacturing” or “lean production,” focuses on maximizing customer value by removing waste and eliminating defects. Lean tools are about understanding the process, looking for waste, preventing mistakes, and documenting what you did. 

Let’s look at five lean tools used in process improvements, what they do, and why they’re important. Companion by Minitab can help you get started leveraging the tools of lean and other continuous improvement methods to thrive in your business. These tools are even more powerful if you can share and collaborate with your team, so try Companion’s online dashboard reporting capabilities as well.

1. Voice of the customer (VOC) summary

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A basic tenet of lean is to understand the customer needs and design the process to fully meet (or hopefully exceed) customer expectations. Collecting data from the voice of the customer (VOC) is a critical step. The VOC summary provides a way to capture important information so you can act on it to meet key business goals and improve customer relations.

 Using the VOC summary tool will help you understand the key customer issues and convert those issues into critical customer requirements.

2. Process flow 

Process flows, also known as process maps, help you understand and communicate the activities, or steps, in a process. They also help you see the relationship between inputs and outputs in a process, identify key decision points, and uncover rework loops.

Because this easy-to-visualize method allows people to clearly see a process, it is most effective to build process maps with the team working in the process. Creating a process flow makes waste (e.g., bottlenecks, delays, storage, rework) visible and shows the best opportunities for improvement.

3. Value stream maps (VSM)

A value stream is the collection of all activities, both value-added and nonvalue-added, that generate a product or service required to meet customer needs. Value stream maps extend the usefulness of process flows by adding more data (beyond x’s and y’s), such as material and information flow, operating parameters, defect rates, lead times, and so on. A current-state value stream map identifies waste and helps your team envision an improved future state.

4. 5 Whys

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Lean is about understanding why things are done the way they are. Often, things are done improperly, at the wrong time, or skipped altogether, resulting in process problems. Use the 5 Whys tool to determine the root cause of a problem. By repeating the question, “Why?” and you can uncover the problem’s root cause, the relationships between different root causes, and identify steps to prevent the problem from happening again.

The real root cause should always point to a process that doesn’t work well or doesn’t exist. Most of the time people don’t fail; processes do.

5. 5S audit: sort, set in order, shine, standardize, and sustain

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5S is a team-based set of tools that systematically and methodically organize the workplace. A clean, well-ordered workplace improves efficiency and eliminates waste.

The fifth step, sustain, is one of the hardest steps to accomplish. (It’s akin to losing the weight and keeping it off.) Sustaining requires maintaining the gains of process improvements on a regular basis.

Without it, old habits resurface, and the workplace falls into disarray. One of the advantages of Companion’s online dashboard reporting is the visibility into everyone’s progress. Everyone can see the benefits and be encouraged to keep it up.


About The Author

Bonnie Stone’s picture

Bonnie Stone

Bonnie K. Stone is the market development manager at Minitab.



@Bonnie Stone,What a insightfull content, thank you so much for sharing.

Could you share these tamplates with us? Specially the one about value added flow.

Thank you!


Hi Kelvin:

The templates are part of our Minitab Workspace and Engage Solutions.  To learn more, you can go to our website here  (Visual Project Management Tools | FMEA, Fishbone & More | Minitab).  

Even better...for a free trial of Workspace go here: VSM, Process Map, 5 Whys & Other Tools | Free Trial Download | Minitab

Feel free to email me directly with further questions.

Thanks for the feedback!