GAT Quality Assurance and Improvement 3

Question 1

In Six Sigma, what does a process operating at 'six sigma' level mean in practice?

Accepted Answer

No more than 3.4 defects per million opportunities

Answer

Six Sigma quality means producing no more than 3.4 defects per million opportunities, accounting for a 1.5-sigma process shift.

Question 2

Which phase of the DMAIC framework focuses on identifying the root causes of defects?

Accepted Answer

Analyze

Answer

The Analyze phase uses statistical and graphical tools to identify root causes of the problem identified earlier.

Question 3

A quality team wants to verify whether a process improvement actually reduced defect rates. Which statistical tool is most appropriate?

Accepted Answer

Hypothesis testing

Answer

Hypothesis testing determines whether observed differences in defect rates are statistically significant or due to chance.

Question 4

What is the primary purpose of a SIPOC diagram in quality improvement projects?

Accepted Answer

To provide a high-level overview of a process and its stakeholders

Answer

SIPOC (Suppliers, Inputs, Process, Outputs, Customers) gives a broad process view at the start of an improvement project.

Question 5

Which of the following is an example of an 'internal failure cost' in quality management?

Accepted Answer

Rework performed before product ships

Answer

Internal failure costs occur when defects are found and corrected before the product reaches the customer, such as rework.

(GAT) General Achievement Test Practice Test