Final answer:
The statement that a reduction in process variance results in a higher process capability is True. Reducing variance leads to a more consistent process, increasing its potential to produce outputs within specified limits. This concept is crucial in quality control and process improvement.
Step-by-step explanation:
True or False. A reduction in process variance results in a higher process capability. The statement is True. Process capability is a measure of how well a process can produce output within specified limits, known as specification limits or tolerance limits. Reducing the process variance, which refers to the variability or spread of the data points, results in a more consistent process. This consistency means that the process will more reliably produce outputs within the specification limits, thus indicating a higher process capability. An example of this can be seen in manufacturing where tighter control over quality results in fewer defects and higher uniformity in the products. It's important to note that process capability is separate from process performance. While the former relates to the process's potential under controlled conditions, the latter reflects the actual outcome in the current state. Both are important, but reducing variance directly targets the potential capability. Understanding the impact of process variance on capability is essential for quality control and process improvement strategies, such as those using Six Sigma methodologies. These strategies often aim to reduce variation in order to improve the capability of processes and consistently meet customer requirements.