Free Lean Six Sigma Yellow Belt Measure Phase Tools Questions and Answers — Questions and Answers
Question 1: A project team is in the Measure phase and needs to collect data on the frequency of different types of customer complaints. They want a simple, manual tool to tally occurrences in real-time at the service desk. Which tool is most appropriate for this task?
- Control Chart
- Check Sheet (Correct answer)
- Cause and Effect Diagram
- Scatter Diagram
Correct answer: Check Sheet
A Check Sheet is a structured form used to collect and organize data in real-time at the location where the data is generated. It is ideal for tallying the frequency of specific events, such as different types of customer complaints, making it the perfect tool for this scenario.
Question 2: Which of the following is a primary objective of creating a detailed Data Collection Plan during the Measure phase?
- To brainstorm all possible solutions to the problem.
- To ensure the data collected is relevant, accurate, and consistent. (Correct answer)
- To select the final improvement to be implemented.
- To create a high-level map of the process stakeholders.
Correct answer: To ensure the data collected is relevant, accurate, and consistent.
The Data Collection Plan is a critical Measure phase tool that acts as a work instruction for gathering data. Its purpose is to define what data to collect, how to collect it, who will collect it, and when, ensuring the data is reliable and directly addresses the project's key questions.
Question 3: A team is analyzing a manufacturing process and is concerned that the measurement system itself might be contributing to the observed variation. They want to determine how much variation is due to the equipment (repeatability) versus the different operators using it (reproducibility). What analysis should they perform?
- Process Capability (Cpk) Analysis
- Failure Mode and Effects Analysis (FMEA)
- Gage R&R Study (Correct answer)
- Regression Analysis
Correct answer: Gage R&R Study
A Gage R&R (Repeatability & Reproducibility) study is specifically designed to assess the variation within a measurement system. It quantifies the variation originating from the measurement device (repeatability) and the variation from the different people using the device (reproducibility).
Question 4: A team has collected data on a critical process metric and wants to understand its potential to meet customer specifications. They calculate a value that compares the spread of the process variation to the spread of the specification limits, assuming the process is centered. What have they calculated?
- Sigma Level
- Process Capability Index (Cpk)
- Process Performance Index (Ppk)
- Process Capability (Cp) (Correct answer)
Correct answer: Process Capability (Cp)
Cp, the Process Capability, is a measure of the potential capability of a process. It is calculated as the ratio of the specification width (USL - LSL) to the process width (6-sigma), and it does not account for whether the process mean is centered within the specifications.
Question 5: To establish a baseline of the 'as-is' process, a Yellow Belt needs to create a visual representation that shows the sequence of activities, decision points, and flow of materials or information. Which tool would be most effective for this purpose?
- Pareto Chart
- Process Flow Diagram (Correct answer)
- Control Plan
- Stakeholder Analysis
Correct answer: Process Flow Diagram
A Process Flow Diagram, also known as a process map or flowchart, is a fundamental tool used in the Measure phase to visually document the steps of a process in sequential order. This helps the team understand the current state and identify areas for data collection and analysis.
Question 6: A process has an upper specification limit (USL) of 110 cm and a lower specification limit (LSL) of 90 cm. Data from the process shows it is centered at 100 cm with a standard deviation of 3 cm. The team wants to know if the process is actually capable of meeting the specifications, considering both its spread and centering. Which metric should they use?
- Process Capability (Cp)
- Throughput Yield
- Process Capability Index (Cpk) (Correct answer)
- Rolled Throughput Yield
Correct answer: Process Capability Index (Cpk)
The Process Capability Index (Cpk) is the appropriate metric because it assesses the actual capability of a process by considering both its variation (spread) and how well it is centered between the specification limits. Unlike Cp, Cpk accounts for a process mean that may not be perfectly centered.
Free Lean Six Sigma Yellow Belt Measure Phase Tools Questions and Answers
A project team is in the Measure phase and needs to collect data on the frequency of different types of customer complaints.
They want a simple, manual tool to tally occurrences in real-time at the service desk.
Which tool is most appropriate for this task?