Variable Sampling

Question 1

What type of data is used and variable sampling plans

A. Measurements on a continuous scale. Example length, weight, temperature
B. Count-based defect data. Example number of defective items
C. Binary data example pass fail results
D. Survey-based qualitative feedback

Answer 1

A. Measurements on a continuous scale. Example length, weight and temperature

Variable sampling is used when the quality characteristic can be measured on a numerical scale rather than classified as pass or fail

Question 2

What is a key advantage of using variable sampling over attribute sampling

A. It is easier to implement in all manufacturing processes
B. It does not require statistical analysis
C. It eliminates the need for inspection equipment
D. Requires smaller sample sizes for the same level of decision competence

Answer 2

D. It requires smaller sample sizes for the same level of decision confidence

Variable sampling provides more information per sample, allowing smaller sample sizes compared to attributes sampling

Question 3

What happens to the acceptability factor k when aql becomes stricter

A. Increases
B. Decreases
C. Remains unchanged
D. Becomes zero

Answer 3

A. Increases

Stricter aql requires higher k higher k means tighter control, reduces acceptability probability and provides better quality assurance

Question 4

What action is taken if the calculated quality index is less than the acceptability Factor

A. Accept the lot
B. Reject the lot
C. Take more samples
D. Reduce inspection level

Answer 4

B. Reject a lot

Qi must exceed k for acceptance. Lower qi indicates poor quality, immediate rejection. No additional sampling needed