Input-process-output (I-P-O) is a structured methodology ... Understandably, we should make good use of this collective ...

Hypothesis testing can be daunting, but making use of the two ... and understanding those key process input variables that significantly impact our output variation is an all-around winner.

Think of a bicycle - when you pedal (input), the chain and gears (process) make the wheel turn (output). Other examples include door handles, wind-up toys, and pencil sharpeners.