Step 3B: Choosing the Correct Control Chart (Continuous Data)
April 3, 2025
Just like there are many types of discrete data charts available, there are also many types of continuous control charts available. The Six Sigma process methodology prescribes which chart must be used when. The prescription in the case of continuous data points is largely based on sample size. Below is the list of the different…
If the data type that needs to be charted is discrete, then it must fall between one of binary or count types. As the name suggests in case of binary distribution, there are only two possibilities, success and failure, defective and not defective, whereas in the case of count type distribution there may be more…
The Six Sigma project is not complete until the concerned personnel who have to operate the process have the know-how to do so. Many Six Sigma projects have failed because the project team was overjoyed at achieving success. However, one must not forget that improvements are only on paper until they are implemented. And there…
As we have seen, Six Sigma is an elaborate methodology. It requires time to learn and even more time to successfully implement. However, as we have also seen that there is a golden pot at the end of the rainbow. Countless organizations have transformed their operations based on their Six Sigma capabilities. Nowadays, having processes that are Six Sigma efficient are a pre-requisite to survive the competition.
However, many feel that the formalities involved in closing a Six Sigma project are numerous and worthless. If you have a narrow horizon than this opinion may be correct. If you just consider one project at a time then the efforts may seem unnecessary and a waste of resources. However, in most organizations Six Sigma is a philosophy and a way of life and hence as we shall see the closing formalities do add value to the subsequent projects.
Here are a few good reasons why one should spend time on writing detailed documentation about the project:
Positive Lessons: Each project brings along with itself some new lessons. There are many positive lessons like the application of newer technology, discovering the drivers of a certain kind of process and so on. Documenting these positive lessons and preserving them in the knowledge library of the organization helps leverage them at a later date.
Negative Lessons: There are many issues and challenges faced during the project as well. Countless times projects get delayed because of unexpected hurdles. Over the period of time, by trial and error project teams realise that some things work and others don’t in certain situations. Such knowledge is experience based and cannot be found in text books or any other literature.
Six Sigma projects have multiple stakeholders. At the end of the project, it is essential that everyone feels that their needs have been successfully met by the project team. There should never be a scenario wherein one group feels that they have got the raw end of the deal. This is the reason closing Six Sigma projects requires discussions with a wide variety of stakeholders and ultimately a large number of signoffs are required.
Documenting both positive and negative lessons makes things a lot easier for the forthcoming generations of project teams. They do not have to reinvent the wheel. Rather when they face a similar problem, they can just look up the solution that your team may have spent time in discovering and start working from there.
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