IP 11 Beforehand compensation

IP 11 Do it first/Beforehand compensation [Principle of previously placed pillow]

Beforehand compensation by compensating for low reliability in providing a backup system or recovery item.
If something is likely to go wrong, prepare for the event.
More specifically provide an arrangement that will negate or minimize the damage.

It can be challenging to see the real difference between this principle and preliminary counteraction (IP 09). Both are concerned with failure and the resultant negative impact and damage. Knowing that cars can leave the road and crash IP 09 suggests that we have a recovery vehicle and ambulance at the ready. IP 11 suggests that we erect crash barriers to prevent the accident from creating real damage when it happens. In this respect IP 11 is very similar to the concept of "poka yoke" or fail safe/error proofing devices that are only operative when something is about to go wrong, and are designed to prevent failure or error.

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