Which of the following is a valid process metric?

The concept of process metrics is essential for evaluating the performance of business processes. Among the options provided, Mean Time To Failure (MTTF) is a relevant process metric that specifically measures the average time to failure of a system or process. This metric is particularly useful in evaluating the reliability and performance of processes, particularly in manufacturing or technology sectors. By analyzing MTTF, organizations can identify areas for improvement, enhance efficiency, and reduce downtime, leading to more effective operations.

In contrast, while Cost per unit, Return on Investment (ROI), and Net Income are important financial metrics that provide insight into an organization's overall performance, they do not directly measure the efficiency or effectiveness of a specific process. Cost per unit may relate to production efficiency but does not assess process reliability as MTTF does. ROI evaluates the profitability of investments rather than the operational efficiency of processes, and Net Income reflects the company’s overall profitability instead of process performance. Thus, MTTF stands out as the most relevant choice in the context of process metrics.