foolproof

About 0.41 uses per million words.

Meaning

1. adjective Of a device: protected against, or designed to be proof against, misuse or error.
2. adjective Of an idea or plan: certain to succeed in all eventualities, or claimed to be so; infallible.
3. verb To render (something) foolproof.

   We foolproofed the operations.

Similar words

goofproof unfailing infallible unswerving unwavering unfaltering unflagging absolute flawless faultless

Often followed by

way method and system as plan in formula methods