Which of the following best represents a metric for the time dimension of a process?

Lead time is a metric that effectively captures the time dimension of a process by measuring the amount of time it takes for a task to be completed from start to finish. In business processes, particularly in supply chain management, lead time refers to the total time required from the initiation of a process or order until its completion. This metric is crucial for assessing efficiency and responsiveness, as it provides insights into how quickly a business can deliver products or services to its customers.

In contrast, market share is a metric focused on a business's portion of total sales in a specific market, which does not specifically address the time aspect. Inventory supply days represent the number of days that inventory stock is available, which relates to inventory management rather than the overall time efficiency of a process. Product launch variance pertains to discrepancies in the expected versus actual performance or timing of product launches and, while it involves timing, it is more about variance than a direct metric of time on its own. Therefore, lead time stands out as the most representative metric for capturing the time dimension in process evaluation.