Six Sigma is a data-driven methodology aimed at improving business processes by reducing defects and variability. It utilizes statistical tools and techniques to achieve near-perfect quality and efficiency, often represented by achieving less than 3.4 defects per million opportunities.
A Process Flow Diagram (PFD) is a crucial tool in chemical and process engineering that visually represents the major equipment and flow of materials within a process. It provides a high-level overview of a system, focusing on the relationships between different components without delving into detailed specifications or controls.