A financial services firm is analyzing the processing time for mortgage applications. The data is highly skewed to the right due to a few complex applications taking significantly longer. A Green Belt performs both a 2-sample t-test and a Mann-Whitney test to compare processing times between two different underwriting teams. The t-test yields a p-value of 0.08, while the Mann-Whitney test yields a p-value of 0.03. Assuming an alpha of 0.05, what is the most appropriate conclusion?
During the development of a control plan for a chemical batching process, a team identifies that the viscosity of the final product is a critical-to-quality (CTQ) characteristic. The measurement is taken once per batch. Which Statistical Process Control (SPC) chart is most suitable for monitoring this process variable?
A project team is conducting a Failure Modes and Effects Analysis (FMEA) on a new online order entry system. They have identified a potential failure mode: 'Incorrect shipping address captured.' The team has assigned the following scores: - Severity: 8 (major disruption; customer receives order late) - Occurrence: 3 (occurs infrequently) - Detection: 7 (only detected by customer complaint after shipment) What is the Risk Priority Number (RPN) for this failure mode, and what does it primarily indicate?
A hospital is aiming to reduce the turnaround time for lab results. The project team has collected data and determined that the process is stable but has a Cpk of 0.75. Which of the following activities should be the team's immediate priority in the DMAIC process? (Select TWO)
True or False: In a Lean environment, 'pull' systems are designed to minimize overproduction by producing goods or services only when there is a downstream demand.
A software development team wants to analyze the relationship between the number of 'lines of code' (X) and the 'number of defects' (Y) in a software module. After creating a scatter plot, they perform a simple linear regression analysis. The analysis yields an R-squared (R-sq) value of 85%. What is the correct interpretation of this R-sq value?
**Case Study:** A large e-commerce company, 'GlobalCart', is experiencing a high rate of customer complaints related to delayed shipments. A Six Sigma Green Belt is assigned to lead a project to address this issue. The project charter defines the primary metric as 'Order-to-Delivery Time' and the goal is to reduce the average time by 25% and the standard deviation by 40% within six months. The project team is currently in the Measure phase and has created a high-level SIPOC diagram. During data collection, the team discovers that there are multiple data systems tracking different parts of the process: one for order placement, another for warehouse picking, and a third for courier tracking. The timestamps in these systems are not synchronized, and some data is manually entered, leading to potential inaccuracies. Before analyzing the end-to-end process time, the team is concerned about the quality of the data they are collecting. What is the most critical next step the Green Belt should take to ensure the integrity of the project's Measure phase?
A project team is trying to identify the 'vital few' causes of defects from a long list of potential causes generated during a brainstorming session. Which tool is most effective for this purpose?
Which of the following describes the Cost of Poor Quality (COPQ) category that includes the costs of scrap, rework, and material waste identified *before* a product reaches the customer?
A team is designing a Poka-Yoke (mistake-proofing) device for an assembly process. The goal is to prevent a part from being installed backward. The team designs a fixture with an asymmetric pin configuration that only allows the part to be inserted in the correct orientation. What type of Poka-Yoke method is this?