In quality control contexts such as SPC, which term is associated with reducing variation in processes?

In quality control contexts such as SPC, which term is associated with reducing variation in processes?

• A. Lean
• B. 6 Sigma
• C. Kanban
• D. Scrum

Answer: (B)

Reducing variation in processes is the hallmark of Six Sigma. This approach uses data and statistical analysis to identify the root causes of variability that lead to defects, then implements targeted improvements to keep results consistently within customer specifications. In practice, teams follow a structured DMAIC cycle—define, measure, analyze, improve, and control—to quantify how much a process deviates, understand why those deviations occur, and put lasting controls in place so the process stays stable over time. In quality-control contexts like SPC, control charts show when variation is out of control, and Six Sigma provides a rigorous framework for driving that variation down, aiming for a level of performance that corresponds to very low defect rates (often framed as six sigma quality). Lean focuses on eliminating waste and streamlining flow; Kanban is a scheduling method that visualizes work and limits work in progress; Scrum is an iterative project-management approach. These can support quality and efficiency, but the term most directly tied to reducing process variability is Six Sigma.

Reducing variation in processes is the hallmark of Six Sigma. This approach uses data and statistical analysis to identify the root causes of variability that lead to defects, then implements targeted improvements to keep results consistently within customer specifications. In practice, teams follow a structured DMAIC cycle—define, measure, analyze, improve, and control—to quantify how much a process deviates, understand why those deviations occur, and put lasting controls in place so the process stays stable over time. In quality-control contexts like SPC, control charts show when variation is out of control, and Six Sigma provides a rigorous framework for driving that variation down, aiming for a level of performance that corresponds to very low defect rates (often framed as six sigma quality).

Lean focuses on eliminating waste and streamlining flow; Kanban is a scheduling method that visualizes work and limits work in progress; Scrum is an iterative project-management approach. These can support quality and efficiency, but the term most directly tied to reducing process variability is Six Sigma.