ASQ Certified Six Sigma Black Belt (CSSBB) — Question 7

If the production is for higher volume and monitoring and the Mean and variability is to be monitored for four machines producing product and the characteristic to be monitored is Variable Data, which SPC Chart is best to be selected?

Answer options

• A. Xbar-R Chart
• B. Individual-MR Chart
• C. NP Chart
• D. CUSUM Chart

Correct answer: A

Explanation

The Xbar-R Chart is ideal for tracking the mean and range of variable data from multiple machines, making it suitable for high-volume production monitoring. The Individual-MR Chart is better for individual measurements rather than grouped data, while the NP Chart is used for attribute data, and the CUSUM Chart is more suited for detecting small shifts in the process, making them less appropriate in this context.