Wiktionary
according to plan
prep.phr. As intended, as planned; without the occurrence of any complications.
Usage examples of "according to plan".
If things went according to plan, those on the bridge and already in the square were toast, but there was no way the limited number of suits of powered armor available to him was going to be able to simultaneously seal the bridge and round up anyone who wasn't already on it.
Supposing all had gone according to plan, then Rhodan should have long since sent some message.
Everything had gone according to plan, including the exercise of special privilege.
It did not seem possible that on this occasion everything had worked according to plan.