Six Sigma vs Lean Six Sigma

September 10, 2019

Bottom line: Which one is better?

Bottom line: Six Sigma is better.

Six sigma is better when we compare six sigma vs lean sigma as it can be used to reduce errors in production as well as nonproduction environments.

Six Sigma vs Lean Six Sigma: FEATURES

Six sigma main goals is to eliminate defects and waste with a focus of improving quality and efficiency by streamlining as well as improving all business processes. It was initially designed to be used in manufacturing but was later transformed into suit all aspects of business ranging from customer support to management to service delivery. It is essential in leadership of any organization together with wide-scale implementation; a company can achieve real and measurable performance.

Lean Sigma on the other hand is a tool that businesses use in streamlining manufacturing and producing with the main aim of cutting out unnecessary and wasteful steps for production purposes. Only valuable production steps are maintained during this process and any unproductive part is removed.

Six Sigma and Lean systems have the same goal as they both seek to eliminate waste while creating the most efficient system possible. They only differ from each other on the way they achieve goals. They both identify the root cause of waste differently.

Bottom line: Six Sigma is better.

Six Sigma vs Lean Six Sigma: WORK MANAGEMENT

As earlier mentioned, Six Sigma is a disciplined, process-centric and data-driven process for eliminating variations in any given process, function, industry, domain as well as company. It is designed to improve output quality of a process as it initiates the improvements by identifying and removing the main root-causes of targeted defects in the whole process.

Six Sigma is aimed at helping businesses achieve and maintain customer and vendor satisfaction and still remain profitable. This is achieved by first, standardizing and streamlining operations, second, by improving different dimensions of quality and lastly by eliminating defects in every organization-wide process.

Lean on the other hand is a process whereby you get more outcome, output or result than a process can produce. In other terms, lean is known as lean manufacturing, lean production or lean management. In simple terms, you are applying the lean principle if activities are completed in lesser time with better performance, occupying lesser storage, doing tasks with lesser human effort, using less machinery without sacrificing efficiency and less material consumption without sacrificing quality.

Bottom line: Six Sigma is better.

Six Sigma vs Lean Six Sigma: COLLABORATION

Six Sigma focuses on reducing variance and errors in a production process because processes that don’t have consistent dependability always lead to errors defective products. The goal of six sigma is to reduce defects to 3.4 per one million opportunities which is the standard of Six sigma. There are two primary methods involved in six sigma. The two methods use data-driven, fact based approaches in identifying and eliminating defects. First we have DMAIC which in full means Define, measure, analyse, improve and control and it is used to correct issues in any existing process. Then we have the DMADV which means Define, measure, analyse, design and verify and is used to create new process.

The main focus of lean sigma is on waste attack and any activity that doesn’t add value to the final product or service is done away with and a solution found to replace the issue. Lean focuses on eight main areas while eliminating waste and they include defects in process, overproduction, waiting or idle time between operations, non-utilized talent (unable to make use of skills employees bring to the table), wasteful transportation practices, excess inventory, unnecessary actions by employees or machine and extra processing or steps that are valueless in production.

With the fact that lean is focuses in manufacturing, it works across all industries and in all types of operations as well as operations. Lean requires optimization of a process as it is goes through several technologies, assets and departments before the final destination who is the customer rather than focusing on a single point.

Bottom line: Lean Sigma is better.


Six sigma is better in this review as it is a problem-solving methodology that focuses on the reduction of variability.