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The DMAIC methodology, which stands for Define, Measure, Analyze, Improve, and Control - and it has a universal following.
Other methodologies are similar to DMIAC but have a few variations that are suitable in various situations. It's DMADV, which stands for Define, Measure, Analyze, Design and Verify.
Similarities
Except for a few additional features, DMADV and DMAIC are pretty similar to each other. Both have been designed to suit the needs of different companies; however, their main objective is the same.
The aim is to achieve defects less than 3.4 per million opportunities. The aim of both the methodologies is to use statistical methods to find defects causing variations and leading to problems in different processes. Another common feature of the two is that they are aligned to the financial and organization objectives.
Leadership for both involves Champions, Master Black Belts and Black Belts and the success of the project highly depends upon the participation of all process owners.
Differences
Though the first three phases are the same, these two methodologies have distinct differences. The DMAIC methodology is mainly associated with defining the business process for the purpose of reduction in variations.
The measure phase involves collecting of data related to current performance of business processes. The DMADV methodology can be seen as a type of DFSS methodology that is concerned with the development of the products or services based on the needs of the customer.
The measures of the DMADV are those in relation to the customer needs and specifications.
Process improvements that are achieved as a result of the DMAIC methodology are based on root cause analysis to find the exact problem areas. The defects can be pinpointed and related to a specific cause leading to the recurrence of the problem.
However, using the DMADV methodology, the efforts emphasize finding options that will fit the requirements of customers and matching their specifications. There is a control system in place to ensure future performance as a part of the DMAIC methodology.
However, DMADV involves the verification stage, which includes simulation tests to verify the efficiency of products according to customer specifications.
Considering the different factors of the two methodologies, companies will be able to differentiate in what would be suitable in which situations. They may even find the need to use both the methodologies if they set out to improve overall business processes and products.
If there appears to be a need to redesign a product from scratch to meet the customer specifications, teams will find using the DMADV methodology better. If the company may need to simply improve existing processes to match standards leading to satisfaction of customer needs, they will find the DMAIC methodology suitable.
Six Sigma Black Belts and the entire Six Sigma team can study the needs of the organization and make the right choice between DMAIC and DMADV. The appropriate selection of the methodology will help achieve success in the Six Sigma initiatives.
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