LMC Quality Assurance & Improvement 3

Question 1

In the DMAIC improvement cycle, during which phase are process capability studies and control charts most commonly established?

Accepted Answer

Control

Answer

The Control phase establishes monitoring systems like control charts to sustain improvements and detect future deviations.

Question 2

A supervisor implements a standard that requires operators to check part dimensions every 10 pieces. This practice is an example of:

Accepted Answer

In-process inspection (sampling control)

Answer

Periodic in-process inspection using sampling helps detect shifts in quality early without inspecting every unit.

Question 3

Which Lean principle states that quality should be built into the product rather than inspected in at the end?

Accepted Answer

Built-in quality (jidoka)

Answer

Built-in quality (jidoka) holds that processes should be designed to detect and prevent defects, not rely on final inspection.

Question 4

A control chart shows several data points alternating consistently above and below the centerline. This pattern is most likely caused by:

Accepted Answer

Operator rotation between two differently calibrated machines

Answer

A consistent alternating pattern on a control chart often signals systematic differences between two sources, such as operators or machines.

Question 5

When applying FMEA (Failure Mode and Effects Analysis) in Lean quality improvement, the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

RPN = Severity × Occurrence × Detection; higher RPN values identify failure modes that require priority corrective action.

(LMC) Lean Management Certification Practice Test