Six Sigma Part 4: DMAIC vs DMADV Methodology

DMAIC and DMADV are used to improve the existing process or develop new process according to principles of Six sigma. There are various similarities and differences between two methods, which will be discussed in detail.

[1] Similarities between DMAIC and DMADV:

• Both uses structured method to reduce variations and solve the problem
• A group of members are used to solve any problem
• Both the methodology collects and analyze data to make any informed decision
• Both are customer focused 
• They have many tools in common (Brainstorming, Design of experiments, Failure mode and effect analysis)

·   [2] Difference between DMAIC and DMADV:

•     DMAIC as the full form suggests addresses the current process and DMADV addresses the design process.
•     DMAIC aims at reducing or eliminating defects in the existing process (reactive) while DMADV aims at preventing defects (proactive).
•   The solution of DMAIC is specific, while DMADV is the part of solution design process.
•    DMAIC have the last step as control, to sustain the gain while DMADV verify and validate the finished design.