Input-process-output (I-P-O) is a structured methodology ... both of which refer to the intended visual nature of the method. A simple example is shown below from healthcare research.

They process this input and the output unlocks our devices. Sensors are used to collect information automatically from the environment and use it as input for a computing device. Weather stations ...

A key process input variable (KPIV) is a process input that provides a significant impact on the output variation of a process or a system, or on the key process output variable (KPOV) of a product.