The saying goes: "Plans are useless but Planning is invaluable" - and it goes well with "No business plan survives first contact with the customers" (which was

The saying goes: "Plans are useless but Planning is invaluable" - and it goes well with "No business plan survives first contact with the customers" (which was adapted from IIRC Churchil's "No battle plan survives first contact with the enemy", even though customers shouldn't in general be regarded as enemies)