bidding system
in contract bridge, a set of agreements assigned to (sequences of) calls so that a partnership can ascertain which contract, whether made or defeated and whether bid by them or by their opponents, would give them the best scoring result
en-GB/ˈbɪdɪŋ ˈsɪstəm/
en-US/ˈbɪdɪŋ ˈsɪstəm/