Lean vs Six Sigma

Lean Process

The Five Fundamental Principles:

Identification of value Ascertainment of value stream Flow of Activities Pull Perfection

Six Sigma

Two methodologies for implementing six sigma:

Difference between Lean Manufacturing [LM] and Six Sigma [SS] Methodology

→ Lean Manufacturing focuses on the removal of waste from the system and Six Sigma focuses on reducing the variation from the product or process.→ The concept ofwas firstly suggested by the Toyota Production System.→ Motorola primarily introducedin the year 1986 which ensures that 3.4 ppm of defect of manufactured products.→ It is an organized sequence of operations used for eliminating wastes.→ Theare Transportation, Inventory, Motion, Waiting, Over Production, Over Processing, Defect generation, Skill-set.→ Toyota Production System introduced the concept of Lean_Thinking & operation in the 1990's.→ The elimination of wastes can be done by analyzing every process and non-productive steps.→ There are two main concepts are Just in Time (JIT) and Jidoka.→ Motorola introduced the Six_Sigma_Methodology in 1986.→ This_methodology is used for maintaining and improving theand processes also this_methodology focuses on providing products and services with the highest quality.→ After the success of Motorola, many other organizations have also implemented the 6𝛔.→ The foundation of the 6𝛔 technique in probability and normal distribution.[1] DMAIC (Define, Measure, Analyze, Improve, Control): When the improvements are made in the existing product, service or operation.[2] DMADV (Define, Measure, Analyze, Design, Verify): When a new product, service or operation is designed.[1] Definition→ Lean Manufacturing eliminate wastes from system or process→ Six_Sigma reduces the variation from the product or process[2] Introduced→ LM was initiated in the 1990's by the Toyota Production System (Toyota Motors)→ SS was initiated in the 1980s by the Motorola[3] Major focus→ LM focuses on the process_flow.→ SS focuses on the problem.[4] Tools usedare used for the improvement project like 5S methodology, Poka-Yoke, Kaizen, etc→ SS: Statistical Tools are used for the improvement project likeScatter Diagram, etc[5] Nature of Control→ LM focuses on visual control→ SS focuses on statistical process_control[6] Methodology→ LM: To eliminate eight wastes (i.e. TIMWOODS such as Transportation, Inventory, Motion, Waiting, Over Production, Over Processing, Defect generation, Skill-set)→ SS:(Define, Measure, Analyze, Improve, Control) or other methodology for new product or process is DMADV (Define, Measure, Analyze, Design, Verify) methodologies are used.[7] Major benefits→ LM: Improve production by increasing productivity→ SS: This methodology improves profit and quality of the product