QA, QC & Testing


When a key is turned in a door lock, what happens?

The door unlocks and by pushing or pulling the door, it can be opened. We know that by turning the key we expect a certain outcome to occur, that is the door open.

This outcome is known as the expected result of the action. The action is turning the key.

Quality Assurance 14

As you can see above, the task was to unlock the door, which required an action, which was to turn the key. The expected result of this action was that the door would unlock.

What would have happened if another key was used?

Quality Assurance 15

If the wrong key is used then the door will not unlock and as a result this task fails. As its prime purpose is to open the door which has not being accomplished.