CQE Reliability and Risk Management 3

Question 1

What is the purpose of a Design of Experiments (DOE) in quality and reliability improvement?

Accepted Answer

To systematically vary input factors and measure effects to understand cause-and-effect relationships

Answer

DOE efficiently identifies which input variables significantly affect process outputs by systematically varying multiple factors simultaneously, enabling optimization with fewer experiments than one-at-a-time testing.

Question 2

In a full factorial DOE with 3 factors at 2 levels each, how many experimental runs are required?

Accepted Answer

8 runs

Answer

A full 2³ factorial design requires 2³ = 8 runs, covering all possible combinations of the 3 factors at their high and low levels.

Question 3

Which risk management strategy accepts a risk without taking action to reduce it?

Accepted Answer

Risk acceptance

Answer

Risk acceptance means acknowledging a risk and deciding to proceed without specific action, typically applied to low-probability, low-impact risks where mitigation costs exceed potential losses.

Question 4

Poka-yoke (error proofing) in product design primarily aims to:

Accepted Answer

Prevent defects by making incorrect actions impossible or immediately obvious

Answer

Poka-yoke devices or methods make it physically impossible or immediately obvious when an error is about to occur, preventing defects at the source rather than detecting them downstream.

Question 5

In reliability-centered maintenance (RCM), tasks are selected based on:

Accepted Answer

The consequences of failure and the effectiveness of proactive maintenance tasks

Answer

RCM selects maintenance tasks by analyzing the consequences of each failure mode and determining whether a proactive task can cost-effectively reduce those consequences.

CQE - Certified Quality Engineer Practice Test

CQE - Certified Quality Engineer Practice Test

CQE Reliability and Risk Management 3