BSIE Total Quality Management 4 — Questions and Answers
Question 1: Which type of data is collected when classifying products as either 'conforming' or 'nonconforming' to a specification?
- Variable data
- Attribute data (Correct answer)
- Continuous data
- Ordinal data
Correct answer: Attribute data
Attribute data classifies items into discrete categories such as pass/fail or conforming/nonconforming, unlike variable data which measures a continuous quantity.
Question 2: A p-chart in statistical process control is used to monitor which quality characteristic?
- The average measurement of a continuous variable
- The range of measurements within a sample
- The proportion of nonconforming items in a sample (Correct answer)
- The number of defects per unit inspected
Correct answer: The proportion of nonconforming items in a sample
A p-chart tracks the fraction or proportion of defective (nonconforming) items in successive samples, making it appropriate for attribute data.
Question 3: In the context of lean TQM integration, what does 'muda' refer to?
- A Japanese term for continuous improvement through small incremental steps
- Any activity that consumes resources but does not add value from the customer's perspective (Correct answer)
- The visual management system used on the shop floor
- A mistake-proofing device that prevents defects from occurring
Correct answer: Any activity that consumes resources but does not add value from the customer's perspective
Muda is a Japanese term meaning 'waste' — any activity or resource consumption that does not add value as perceived by the customer.
Question 4: What is the purpose of an acceptance sampling plan in quality control?
- To continuously monitor a process and signal when it goes out of control
- To determine whether to accept or reject a lot based on inspection of a sample (Correct answer)
- To calculate the process capability of a manufacturing operation
- To identify the root cause of defects through structured problem solving
Correct answer: To determine whether to accept or reject a lot based on inspection of a sample
Acceptance sampling uses statistical sampling to decide whether an entire lot of products should be accepted or rejected based on the quality found in a representative sample.
Question 5: Which of the following best describes 'Poka-Yoke' in TQM and lean manufacturing?
- A daily team meeting to review safety and quality metrics
- An error-proofing mechanism that prevents defects or makes defects immediately obvious (Correct answer)
- A scheduling system that matches production to customer demand
- A documentation system for tracking nonconformances
Correct answer: An error-proofing mechanism that prevents defects or makes defects immediately obvious
Poka-Yoke refers to error-proofing devices or methods that either prevent a mistake from occurring or detect and signal a mistake immediately when it does occur.
Question 6: ISO 9001 is best characterized as a quality management standard that focuses on:
- Prescribing specific product specifications that all manufacturers must meet
- Establishing a process-based quality management system framework for consistent customer satisfaction (Correct answer)
- Providing industry-specific guidelines for pharmaceutical or food manufacturing
- Mandating specific statistical tools and sampling plans for quality control
Correct answer: Establishing a process-based quality management system framework for consistent customer satisfaction
ISO 9001 specifies requirements for a quality management system that organizations can use to demonstrate their ability to consistently provide products and services that meet customer and regulatory requirements.
Question 7: Which type of failure cost is associated with defects discovered after a product has been delivered to the customer?
- Prevention costs
- Appraisal costs
- Internal failure costs
- External failure costs (Correct answer)
Correct answer: External failure costs
External failure costs occur when defective products reach customers and include warranty claims, product recalls, customer complaints, and lost goodwill — the most expensive category of quality costs.
BSIE Total Quality Management 4
Which type of data is collected when classifying products as either 'conforming' or 'nonconforming' to a specification?