Six Sigma Methodology

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Six Sigma has following two key methodologies:

  • DMAIC: refers to a data-driven quality strategy for improving processes. This methodology is used to improve an existing business process.

  • DMADV: refers to a data-driven quality strategy for designing products & processes. This methodology is used to create new product designs or process designs in such a way that it results in a more predictable, mature and defect free performance.

There is one more methodology called DFSS - Design For Six Sigma. DFSS is a data-driven quality strategy for designing design or re-design a product or service from the ground up.

Sometimes a DMAIC project may turn into a DFSS project because the process in question requires complete redesign to bring about the desired degree of improvement.

DMAIC Methodology:

This methodology consists of following five steps.

Define --> Measure --> Analyze --> Improve -->Control

  • Define : Define the Problem or Project Goals that needs to be addressed.

  • Measure: Measure the problem and process from which it was produced.

  • Analyze: Analyze data & process to determine root causes of defects and opportunities.

  • Improve: Improve the process by finding solutions to fix, diminish, and prevent future problems.

  • Control: Implement, Control, and Sustain the improvements solutions to keep the process on the new course.

In the subsequent session we will give complete detail of DMAIC Methodology.

DMADV Methodology:

This methodology consists of following five steps.

Define --> Measure --> Analyze --> Design -->Verify

  • Define : Define the Problem or Project Goals that needs to be addressed.

  • Measure: Measure and determine customers needs and specifications.

  • Analyze: Analyze the process for meet the customer needs.

  • Design: Design a process that will meet customers needs.

  • Verify: Verify the design performance and ability to meet customer needs.

DFSS Methodology:

DFSS - Design For Six Sigma is a separate and emerging discipline related to Six Sigma quality processes. This is a systematic methodology utilizing tools, training and measurements to enable us to design products and processes that meet customer expectations and can be produced at Six Sigma Quality levels.

This methodology can have following five steps.

Define --> Identify --> Design --> Optimize -->Verify

  • Define : Identify the Customer and project.

  • Identify: Define what the customers want, or what they do not want.

  • Design: Design a process that will meet customers needs.

  • Optimize: Determine process capability & optimize design.

  • Verify: Test, verify, & validate design.



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