Assigning tasks to the various stages of the DMAIC model

Define phase

• Defining the problems to be solved in a given project (for example, using SIPOC),
• Defining the client’s CTQ,
• Defining the project objectives,
• Selecting the project team and assigning specific roles to team members,
• Developing a process map.

The result of the above tasks is the developed project charter.

Measure phase

• Developing a data acquisition plan,
• Performing measurement system variability analysis (e.g., Gage R&R, Kappa),
• Acquiring data for analysis,
• Calculating process capability,
• Analyzing data.

Analyze phase

• Generating improvement ideas (e.g., using brainstorming),
• Identifying potential X’s,
• Checking the relationship of X to Y,
• Finding key X’s,
• Performing a preliminary diagnosis of the problem.

Improve phase

• Identifying potential solutions to the problem,
• Conducting solution testing and risk analysis (e.g., use FMEA),
• Improving process-relevant X’s,
• Drawing up a target process map.

Control phase

• Confirming the effect of the changes made,
• Developing an inspection plan,
• Preparing control cards and SPC,
• Determining new sigma and specification limits,
• Preparing project documentation.

NOTE: After a successful project, the company should reward team members for their good work. Many organizations that want to improve processes using the DMAIC methodology send their employees to Six Sigma training courses. Among Six Sigma training courses, the most popular is the Six Sigma Green Belt level, after completion of which participants receive prestigious certificates. And at the stage of implementing projects to optimize processes in their companies, they receive the full support of an experienced project mentor. A person who completes Six Sigma Green Belt training is capable of independently coordinating projects in accordance with the DMAIC methodology in the future.