Ilssi certification ｜ the course of Six Sigma DMAIC

The latest one is from ILSSI member -- Jonathan Middleton The article , Put forward an interesting DMAIC Describe the model , This model visually represents DMAIC History . Yousi college hopes to briefly introduce .

DMAIC Method is the basic methodology of Six Sigma , There are five steps ： Definition 、 measurement 、 analysis 、 Abbreviation for improvement and control .

Define the problem

Six Sigma DMAIC The difference between the method and many other business tools is , It starts with the problem . There is no limit to this problem , It can be big or small , Easy to solve or complicated . No matter what , No enterprise has problems that need to be solved . An example could be .

1. Our response to customers is not fast enough
2. There are errors in our products or services 、 Missing or defective information
3. We can't produce enough products in normal working days
4. There are variations in our process , But I don't know how to reduce variation .
5. Our process is manual , Efficiency is very low

No problem is the real problem ！

Measurement problem

If we don't record and measure the process , How will we understand the extent of the problem and all possible causes ？ By drawing a flow chart , We can write what is happening on paper , Who is doing what , What systems and files are used , Where is the rework cycle ; All this is on one page .

then , When you think you are satisfied with the process , You can measure . How long does it take to complete each activity , What is the delay between each activity ？

Only by collecting these two measurements , We can add them together , Understand the total cycle time . Measurement helps us determine the baseline of process performance , And say the performance of the process at this time point . We can now see what caused our problems Many underlying reasons （Many Possible Causes）.

To analyze problems

How can we find many possible causes of problems in the measurement stage , Find out several important reasons that have the greatest impact on solving the problem ？ This is it. DMAIC The tasks to be completed in the analysis phase of the method . By analyzing the cycle time of the process and the data surrounding the process , The root cause begins to appear （Root Cause）. These potential root causes are usually best obtained from the people who perform the process . Use all kinds of tools , Such as 5 Why , And work with the team , We can determine the root cause of the problem , Reduce many potential causes to key ones .

Improve the problem with the right solution

Now we understand the root cause of the problem , We need a solution . Work with the team responsible for the activities , We will pool our wisdom , Propose solutions . It's time for them to put on their thinking hats , We also need creativity （Creativity） The stage of . What are the possible things that can help solve the root cause of the problem ？ At this point , You should have a whiteboard full of potential options . However , Not all Potential solutions （Many Alternatives Solutions） Are feasible or achievable , Especially if you have done something " Blue sky thinking ".

Some solutions will put more effort than others , Some solutions will meet your requirements better than others . This is like Pugh Matrix、Solution Matrix and Effort vs Benefits Analysis and other tools . These tools and other six sigma tools will help you boil down all these potential solutions to the best one . Okay , Now is the time to deliver the project and implement the best solution .

Control change

therefore , The problem has been understood and documented , We have mapped the problematic process and measured it , We have analyzed the data around the process to determine the root cause , And put forward the best solution to the problem . What's next ？ We're done , Am I right? ？ How do we know that the solution you implemented has solved the problem ？

By continuing to measure the new process , We can learn about its new performance , And confirm that it is implemented in the way we expect . We can ensure that the new process is under control and stable . By comparing the measurement results collected in the measurement stage , We can find the improvement of process performance , Prove the benefits of the solution . Continuous measurement will enable you to see if you can change the process again to further improve , Or investigate the reasons for the deterioration of process performance .

summary

Six Sigma DMAIC Method is a data-driven problem solving tool . For this reason , It's unique . The definition of Six Sigma 、 measurement 、 analysis 、 improvement 、 The control phase is a framework , It can help you collect the data you need , Analyze it , Then realize the best solution . The types of problems it can help you solve are infinite , The types of industries it uses are also infinite .