Lean vs Six Sigma Lean Process The Five Fundamental Principles Six Sigma Two methodologies for implementing six sigma Difference between Lean Manufacturing [LM] and Six Sigma [SS] Methodology Powered by Mouhcine NAHAL Msc LSSGB

1. Mouhcine NAHAL
mouhcine.nahal@gmail.com

2. Lean vs Six Sigma
→ 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 of Lean Manufacturing was firstly suggested by the Toyota Production System.
→ Motorola primarily introduced Six Sigma in the year 1986 which ensures that 3.4 ppm of defect of
manufactured products.

3. Lean Process
→ It is an organized sequence of operations used for eliminating wastes.
→ The 8 wastes of Lean Manufacturing are Transportation, Inventory, Motion, Waiting, Overproduction,
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.

4. The Five Fundamental Principles:
1. Identification of value
2. Ascertainment of value stream
3. Flow of Activities
4. Pull
5. Perfection

5. Six Sigmaeadline
→ Motorola introduced the Six Sigma Methodology in 1986.
→ This methodology is used for maintaining and improving the Quality of Products and 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.

6. Two methodologies for implementing six sigma:
[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.

7. Difference between Lean Manufacturing [LM] and Six
Sigma [SS] Methodology
[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 used
→ Lean Manufacturing Tools are used for the improvement project like 5S methodology, Poka-Yoke,Kaizen, etc
→ SS: Statistical Tools are used for the improvement project like Control Chart, Histogram, Scatter 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: DMAIC Methodology (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