Quality Assurance & Improvement Flashcards

Which statistical tool is used to identify the few causes responsible for the majority of defects in a packaging process?

Answer: Pareto chart

A Pareto chart applies the 80/20 rule to rank defect causes by frequency, highlighting the vital few that drive most problems.

In a packaging quality system, a 'control limit' differs from a 'specification limit' in that control limits are:

Answer: Calculated from process data and reflect natural variation

Control limits are derived statistically from process performance data, while specification limits are externally defined requirements.

A packaging line produces seal strength measurements that follow a normal distribution with mean 12 N and standard deviation 1 N. What percentage of seals fall between 10 N and 14 N?

Answer: 95.4%

Values within ±2 standard deviations of the mean encompass approximately 95.4% of a normal distribution.

Which acceptance sampling standard is most commonly referenced in the US packaging industry for attribute inspection?

Answer: ANSI/ASQ Z1.4

ANSI/ASQ Z1.4 provides sampling procedures and tables for inspection by attributes and is widely used in US packaging QA.

What does the term 'AQL' stand for in the context of packaging quality inspection?

Answer: Acceptable Quality Level

AQL (Acceptable Quality Level) is the maximum defect percentage that can be considered satisfactory as a process average.

A corrective action in a CAPA system is best described as an action taken to:

Answer: Eliminate the root cause of a detected nonconformity

Corrective action addresses the root cause of an existing nonconformity to prevent recurrence, distinguishing it from preventive action.

Which of the following best describes 'mistake-proofing' (poka-yoke) in a packaging operation?

Answer: A mechanism that makes it impossible or immediately obvious when an error occurs

Poka-yoke devices physically prevent errors or provide immediate feedback so defects cannot be passed along the packaging line.