What is a characteristic of a metrics-based approach for test estimation?

A metrics-based approach for test estimation relies on quantifiable data collected from previous projects to inform current estimations. By using budget metrics from a similar past testing project, teams can analyze factors such as effort, resources, and time that were consumed in that previous context. This historical data serves as a reference point, enabling teams to create a more informed estimate for the current project based on actual past performance, thus improving accuracy.

In contrast, relying solely on experience from interviews may involve subjective insights and could vary significantly depending on individual perspectives. While team consensus on automation effort can contribute value, it may not be based on a comprehensive data set or quantitative analysis. Similarly, averages from business experts, while useful, do not necessarily give a concrete or detailed picture of testing activities and may lack the specific relevant data needed for effective estimation. Therefore, using a budget from a prior project stands out as the most characteristic of a metrics-based approach, focusing on factual and quantifiable data to guide estimation.