Quality Practices & Measurement Flashcards

What does a Cp value of 1.33 indicate about a process?

Answer: The process has good capability with a margin

Cp of 1.33 means the process spread fits within the tolerance with roughly a 25% margin on each side, indicating good capability.

Which of the following best describes 'measurement uncertainty'?

Answer: A parameter that characterizes the dispersion of measured values

Measurement uncertainty is a quantified estimate of the range of values within which the true value likely falls.

In a Pareto analysis of defects, which defects should be addressed first?

Answer: The defects with the highest frequency or cost

Pareto analysis follows the 80/20 rule — addressing the vital few defects with highest frequency or cost yields the greatest quality improvement.

What is 'gage repeatability' in a Gage R&R study?

Answer: Variation when the same operator measures the same part multiple times

Repeatability measures the gage's inherent variation when one operator repeatedly measures the same part under the same conditions.

Which SPC rule indicates a potential process shift when 9 consecutive points fall on one side of the centerline?

Answer: Rule 2 – Nine points in a row on one side

The Nelson/Western Electric rule identifying 9 consecutive points on one side of the centerline signals a likely process mean shift.

A dimension is specified as 2.500 ± 0.010 inches. What is the total tolerance band?

Answer: 0.020 inch

The total tolerance band is the sum of the upper and lower deviations: 0.010 + 0.010 = 0.020 inch.

Which tool is used to measure the inside diameter of a bore with high precision?

Answer: Bore gauge (telescoping gauge + micrometer)

A bore gauge (or telescoping gauge transferred to a micrometer) is the standard method for accurately measuring internal diameters.