What is the foundational Lean Six Sigma formula used to express the relationship between inputs and key outputs?

The foundational Lean Six Sigma formula that expresses the relationship between inputs and key outputs is represented as Y = f(x). In this formula, 'Y' signifies the key outputs or results of a process, while 'x' represents the various inputs or factors that influence those outputs. The function 'f' indicates that these outputs are dependent on the function of the inputs.

This formula encapsulates the core idea of Lean Six Sigma, which is to improve process performance by understanding and optimizing the inputs that affect the desired outputs. By identifying and controlling these inputs, organizations can enhance the quality and efficiency of their processes, leading to better results and customer satisfaction.

This framework is essential for practitioners because it clarifies that successful process improvement requires a focus not just on what the outputs are but also on how the inputs contribute to those outputs. It highlights the importance of process analysis and the role of each element within the system, which is key to effective problem-solving and decision-making in Lean Six Sigma initiatives.