Six Sigma Black Belt Certified Practice Exam 2026 – The All-in-One Guide to Master Your Certification!

The Process Capability Index is the correct measure that indicates whether a process meets specified quality limits in Six Sigma. This index quantifies how well a process is performing relative to its established specifications. It assesses both the variability of the process and the allowable limits set by customer requirements, providing insight into the ability of a process to produce products that conform to quality standards.

The Process Capability Index typically utilizes statistical measures such as Cp, Cpk, Pp, and Ppk. These indices help practitioners understand how much the process varies in relation to the specification limits. A higher value indicates that the process is capable and consistently producing quality products within the defined limits.

In contrast, the other options focus on different aspects of quality and performance. Cost-Effectiveness Ratio relates to the comparison of costs against the benefits derived from a process. Quality Assurance Score generally evaluates the effectiveness of quality systems in place, while a Service Level Agreement outlines service expectations and performance metrics between service providers and clients. None of these measures directly assess a process's ability to meet quality specifications in the same way that the Process Capability Index does.