Certified Six Sigma Black Belt Voice of the Customer (VOC) Questions and Answers — Questions and Answers
Question 1: A Six Sigma project team is in the Define phase and is tasked with translating broad, vague customer statements like "I want a reliable car" into specific, measurable requirements for the design team. Which of the following tools is specifically designed for this purpose?
- Affinity Diagram
- Kano Model
- Critical to Quality (CTQ) Tree (Correct answer)
- SIPOC Diagram
Correct answer: Critical to Quality (CTQ) Tree
A Critical to Quality (CTQ) Tree is a tool used to translate broad customer needs (the "Voice of the Customer") into specific, measurable, and actionable performance requirements. It starts with the general need, identifies the drivers of quality that fulfill that need, and then breaks those drivers down into specific, quantifiable requirements that the process or product must meet.
Question 2: A software development company gathers customer feedback from multiple sources, including customer support calls, online reviews, and product return data. This type of Voice of the Customer (VOC) data collection is best described as:
- Proactive
- Qualitative
- Reactive (Correct answer)
- Longitudinal
Correct answer: Reactive
Reactive VOC data is information that is received after a customer has already experienced a product or service. Sources like customer support calls, complaints, and product returns are all examples of reactive data because the customer initiates the contact in response to their experience. Proactive methods, in contrast, involve seeking out feedback through surveys, interviews, or focus groups before or during the customer experience.
Question 3: In a project to improve a hotel's guest experience, the team uses the Kano model to analyze VOC data. They discover that providing high-speed, complimentary Wi-Fi is a feature that, if absent, leads to extreme dissatisfaction, but when present, does not particularly increase satisfaction. According to the Kano model, how would this feature be classified?
- Attractive/Exciter
- One-Dimensional/Performance
- Indifferent
- Must-Be/Basic (Correct answer)
Correct answer: Must-Be/Basic
The Kano model classifies customer requirements into several categories. 'Must-Be' or 'Basic' qualities are expected by customers and cause dissatisfaction if they are not present, but their presence does not lead to increased satisfaction because they are taken for granted. In this scenario, complimentary Wi-Fi is an expected basic amenity for modern hotel guests.
Question 4: A project team is developing a new online banking application. They conduct focus groups with potential users to understand their needs and expectations before any code is written. Which of the following best describes this VOC activity?
- Benchmarking against competitors
- Collecting reactive customer data
- Validating the measurement system
- Gathering proactive VOC data (Correct answer)
Correct answer: Gathering proactive VOC data
Proactive VOC data collection involves actively seeking out customer input before or during their interaction with a product or service. Conducting focus groups to understand needs for a new product is a classic example of a proactive approach, as it aims to prevent defects and ensure the product meets customer needs from the outset.
Question 5: Which of the following statements most accurately describes the primary role of the Voice of the Customer (VOC) within the DMAIC (Define, Measure, Analyze, Improve, Control) methodology?
- It is exclusively used in the Control phase to monitor long-term customer satisfaction.
- It is primarily used in the Analyze phase to identify the statistical root causes of defects.
- It is a critical input to the Define phase for establishing project goals and CTQs. (Correct answer)
- It is mainly used in the Improve phase to brainstorm potential solutions.
Correct answer: It is a critical input to the Define phase for establishing project goals and CTQs.
The Voice of the Customer is a foundational element of the Define phase in a DMAIC project. It is used to understand customer needs, which are then translated into specific project goals and Critical to Quality (CTQ) requirements. This ensures the entire project is focused on delivering what truly matters to the customer.
Question 6: A company wants to prioritize a list of potential new product features. They survey customers, asking them how they would feel if a feature was present and how they would feel if it was absent. This approach of classifying features into categories like 'Must-Be', 'Performance', and 'Delighters' is characteristic of which VOC analysis tool?
- Quality Function Deployment (QFD)
- Kano Model (Correct answer)
- Pareto Chart
- Affinity Diagram
Correct answer: Kano Model
The Kano Model is a framework used to prioritize features based on how they impact customer satisfaction. It classifies customer preferences into three main categories: Must-Be (basic expectations), One-Dimensional (performance attributes where more is better), and Attractive (unexpected delighters). This helps teams focus development efforts on features that will have the greatest positive impact on the customer experience.
Certified Six Sigma Black Belt Voice of the Customer (VOC) Questions and Answers
A Six Sigma project team is in the Define phase and is tasked with translating broad, vague customer statements like "I want a reliable car" into specific, measurable requirements for the design team.
Which of the following tools is specifically designed for this purpose?