OIT Quality Assurance and Improvement 3

Question 1

Which PDCA cycle step involves analyzing data collected during a process change to see if the desired improvement occurred?

Accepted Answer

Check

Answer

The 'Check' step of the PDCA cycle involves studying the results of the change to determine whether it achieved the intended improvement.

Question 2

A defect rate of 3.4 defects per million opportunities corresponds to which Sigma level?

Accepted Answer

6 Sigma

Answer

Six Sigma processes achieve a quality level of 3.4 defects per million opportunities (DPMO), representing near-perfect process performance.

Question 3

What does 'poka-yoke' refer to in manufacturing quality?

Accepted Answer

An error-proofing mechanism that prevents or detects defects at their source

Answer

Poka-yoke refers to mistake-proofing devices or methods designed to prevent errors from occurring or to immediately detect them when they do.

Question 4

Which type of quality cost involves inspecting, testing, and auditing to ensure products meet standards?

Accepted Answer

Appraisal costs

Answer

Appraisal costs are incurred to detect nonconformance through inspection, testing, and audits before products reach the customer.

Question 5

In a control chart, what do the Upper Control Limit (UCL) and Lower Control Limit (LCL) represent?

Accepted Answer

The boundaries of expected natural process variation (±3 sigma)

Answer

UCL and LCL on a control chart represent ±3 standard deviations from the process mean, defining the range of expected natural (common cause) variation.

(OIT) Ontario Industrial Trades Certification Practice Test

(OIT) Ontario Industrial Trades Certification Practice Test

OIT Quality Assurance and Improvement 3