Which of the following is the key objective of a six sigma project?

Question

Options

• ADeveloping detailed control charts for critical processes
• BDeveloping a matrix to understand the how's and what's of a problem process
• CReducing variation in critical processes
• DReducing investment costs while improving output quality

• B
  6% (3)
• C
  92% (48)
• D
  2% (1)

Explanation

Six Sigma's core purpose is reducing variation in critical processes (C) - the entire methodology (DMAIC, statistical tools, etc.) exists to minimize defects by tightening process consistency, measured by standard deviations (sigma levels).

Why the distractors are wrong:

• A - Control charts are tools used within a Six Sigma project, not the objective itself.
• B - A matrix mapping "how's and what's" describes a QFD (Quality Function Deployment) or cause-and-effect matrix, which is a tool, not the overarching goal.
• D - Reducing investment costs is a Lean objective; Six Sigma focuses on quality through variance reduction, not cost-cutting per se (cost savings are a byproduct, not the primary goal).

Memory tip: Think of the name - "Six Sigma" literally refers to achieving six standard deviations between the process mean and the nearest specification limit. If the name is about statistical spread, the goal must be about controlling variation.

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