Apparently not. In Waste Management v. Wisconsin Solid Waste Recycling Authority, 84 Wis.2d 462, 267 N.W.2d 659 (1978), the Wisconsin Supreme Court explicitly rejected an interpretation of an earlier case, Menzl v. City of Milwaukee,
32 Wis.2d 266, 145 N.W.2d 198 (1966), which would have allowed a
governmental agency to abandon the procedure it had announced it would
use to award a contract and instead use a completely different method
for awarding the contract. The Waste Management Court declared
that “basic concepts of fair administrative procedure” require that
governmental entities award contracts in accordance with the rules and
procedures they set forth. So, once a municipality has determined to
competitively bid a non-construction contract it must scrupulously
observe the procedures it has established and cannot abandon the process
by contracting with someone who is not the lowest responsible bidder.