OIT Quality Assurance and Improvement 2

Question 1

Which statistical tool is used to identify the most significant causes of defects by ranking them from most to least frequent?

Accepted Answer

Pareto chart

Answer

A Pareto chart ranks defect causes by frequency to help teams focus on the vital few issues causing the most problems.

Question 2

In a quality management context, what does 'process capability' (Cp) measure?

Accepted Answer

The ability of a process to produce output within specification limits

Answer

Process capability (Cp) measures how well a process can produce parts or outputs that fall within defined specification limits.

Question 3

What is the primary purpose of a fishbone (Ishikawa) diagram in quality improvement?

Accepted Answer

Identifying and organizing potential root causes of a problem

Answer

A fishbone diagram visually maps potential root causes of a problem into categories such as Man, Machine, Material, Method, and Environment.

Question 4

A worker notices that a dimension is consistently near the upper control limit on a control chart but never exceeds it. This is BEST described as:

Accepted Answer

A non-random trend requiring investigation

Answer

Consistently clustering near a control limit indicates a non-random pattern (trend or bias), which warrants investigation even if limits are not breached.

Question 5

Which of the following BEST describes 'first pass yield' (FPY)?

Accepted Answer

The percentage of units that complete a process without any rework or rejection

Answer

First pass yield measures the percentage of units that pass through a manufacturing process correctly the first time, without rework.

(OIT) Ontario Industrial Trades Certification Practice Test

(OIT) Ontario Industrial Trades Certification Practice Test

OIT Quality Assurance and Improvement 2