Lean vs. Six-sigma

Difference between Lean and Six-sigma 

Lean and six-sigma are both strategies for the successful running and continuous development of businesses. Although different from each other, the ultimate goal of both techniques is to make a business profitable. Because of this, it is important to give equal attention to both of them.

What is Lean?

Lean is actually a part of the six-sigma methodology. It focuses on reducing waste and idleness, and aims to increase production by increasing the efficiency of its flow process. Lean actually has two concepts: Just-in-time and Jidoka. Just-in-time makes sure that there is minimal accumulating stock in the inventory while Jidoka indicates and prevents mistakes in the production line. Lean is based upon techniques and inventory. Its flow chart is as follows: identifying value, defining value stream, determining process flow, defining pull, and improving process.

What is Six Sigma?

Six-sigma reduces quality problems by reducing variation in process. It is based upon research and deals with parts of process. It aims to define and satisfy client requirements. Process data is required for the implementation of this strategy. Six-sigma is based upon philosophy and has three concepts: DMAIC, DMADV, and Lean. Its flow chart is as follows: defining the problem, measuring the problem, analyzing the process, improving the problem, and controlling the problem.

A brief summary

  • Lean focuses on reducing waste and idleness while six-sigma reduces variation in process
  • Lean aims to increase production by increasing flow process efficiency while six-sigma aims to define and satisfy client requirements
  • Lean has two concepts (Just-in-time and Jidoka) while six-sigma has three (DMAIC, DMADV, and Lean)

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