Which of the following statements is true of Lean-Six Sigma?
a. Lean principles focus on advanced statistical methods.
b. Lean principles and Six-Sigma are separate bodies of knowledge.
c. Lean principles have been developed over a lengthy period of time.
d. Lean principles include the 5Ss framework and practices.
The Correct Answer and Explanation is :
The correct answer is:
d. Lean principles include the 5Ss framework and practices.
Explanation:
Lean and Six Sigma are two distinct methodologies often combined in business improvement initiatives, but they each have their own unique focus and tools.
- Lean principles focus on improving efficiency by reducing waste and non-value-adding activities. It aims to streamline processes to achieve faster production times and improve overall efficiency. Lean is typically more focused on the flow of work and eliminating activities that do not directly contribute to customer value. Lean does not focus on advanced statistical methods, which is why statement a is incorrect.
- Lean principles and Six Sigma are related but not entirely separate. While they have different methodologies, they often work together. Lean focuses on speed and waste reduction, while Six Sigma uses statistical tools to improve quality and reduce variation. They are often combined in organizations as Lean Six Sigma to provide both operational efficiency and quality improvements. Therefore, statement b is incorrect because the two are often used together, even though they have distinct approaches.
- Lean principles have been developed over a long period, but it traces its roots to the Toyota Production System (TPS) developed in the 1940s. While it is based on decades of refinement, it has been popularized and formalized in more recent decades. So, statement c is somewhat true, but not fully specific about its origins or development.
- The 5Ss (Sort, Set in order, Shine, Standardize, Sustain) framework is a core Lean practice. It helps in organizing the workplace to ensure smooth, efficient, and waste-free operations. This framework is part of Lean’s focus on creating a well-ordered and efficient system. Therefore, statement d is correct.
In summary, Lean principles focus on streamlining processes, improving efficiency, and reducing waste, with practices such as the 5Ss being central to its methodology.