Six Sigma is comprised of various methods that help in increasing the effectiveness and efficiency of business processes. The two most commonly used Six Sigma methodologies include DMAIC and DMADV. DMAIC represents define, measure, analyse, improve and control. DMADV represents define, measure, analyse, design and verify. Although both the methodologies have some common characteristics, they cannot be interchanged. They are designed for use in different business processes.
The similarities
- Both the methodologies are used for reducing the number of defects to less than 3.4 per million opportunities available for such defects to occur.
- Both the methodologies use facts and statistical tools for finding solutions to common problems, related to quality.
- Both the methodologies require the services of Green Belts, Black Belts and Master Black Belts during the implementation stage.
- Both concentrate on achieving the financial and business objectives of an organization.
Both the methodologies require support from a Champion and Process Owner during the implementation stage.
The Differences
Both the methodologies may share the same first initials, but that is where the similarities end. The major differences are listed below:
- DMAIC is associated with defining a business process and its applicability whereas DMADV helps in defining customer needs in relation to a product or service.
- DMAIC is used for measuring the current performance of a business process whereas DMADV is used for measuring the customer needs and specifications.
- In DMAIC, a business process is analysed to find the root cause of a defect or recurring problem. In DMADV, a business process is analysed for finding options that will help in satisfying the customer needs and specifications.
- In DMAIC, improvements are made in the business process for eliminating or reducing defects whereas, in DMADV, an appropriate business model is designed that helps in meeting customer requirements.
- In DMAIC, control systems are put in place to keep a check on the future performance of a business process. In DMADV, the suggested business model is put through simulation tests for verifying efficacy in meeting customer needs and specifications.
When can DMAIC and DMADV be used?
Now, we are going to discuss when you can use DMAIC and DMADV. After identifying the similarities and differences, it can be concluded that DMAIC is used on a process or product that already exists, but is unable to meet customer needs or specifications. In comparison, DMADV is used when a new product or process needs to be developed to meet customer requirements. It is also used when a product or process has been optimized using DMAIC but is still unable to meet customer needs and specifications or the Six Sigma quality levels.
Companies who do not have prior experience in Six Sigma can take help from professionals such as ‘Black Belts’ and ‘Master Black Belts’. They help in making the right choice between DMAIC and DMADV. They also provide help during the implementation stage and this is necessary for the success of any Six Sigma initiative or project.