functional measurement

Functional measurement is a method used to assess and quantify how well a system, product, or process performs its intended functions. Instead of just measuring physical properties like size or weight, it focuses on the actual activities or outcomes that matter—for example, how effectively a machine produces a certain result or how efficiently a service meets user needs. This approach helps identify performance levels, improve functionality, and ensure that design changes lead to meaningful enhancements in real-world use, ultimately supporting better decision-making and quality improvement.