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Six Sigma Formula:
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The Six Sigma calculation measures process performance by calculating yield from defects and opportunities. It's a fundamental metric in quality management that helps identify process efficiency and areas for improvement.
The calculator uses the Six Sigma yield formula:
Where:
Explanation: The formula calculates the proportion of defect-free units, providing a measure of process quality and efficiency.
Details: Yield calculation is essential for quality control, process improvement, and Six Sigma projects. It helps organizations measure performance, identify quality issues, and track improvement initiatives.
Tips: Enter the number of defects and total opportunities. Defects cannot exceed opportunities, and opportunities must be greater than zero.
Q1: What is a good yield percentage?
A: In Six Sigma, a yield of 99.99966% (3.4 defects per million opportunities) is considered excellent, representing Six Sigma quality level.
Q2: How is yield related to sigma level?
A: Higher yield percentages correspond to higher sigma levels. The sigma level indicates how many standard deviations fit between the process mean and the nearest specification limit.
Q3: What's the difference between yield and defects per million opportunities (DPMO)?
A: Yield measures the percentage of defect-free units, while DPMO measures defects per million opportunities. They are complementary metrics in quality measurement.
Q4: Can yield be greater than 100%?
A: No, yield is always between 0% and 100%. A yield of 100% means zero defects in the process.
Q5: How often should yield be calculated?
A: Yield should be calculated regularly to monitor process performance. Frequency depends on the process volume and criticality, ranging from daily to monthly calculations.