1. A painting equipment controller for controlling painting equipment so that a predetermined desired level of a painting response is produced, said controller comprising: a database for storing a painting factor-response model, said model interrelating at least one predetermined painting factor with the painting response via a painting factor-response function, said painting factors having a level which is indicative of setting values for controlling the painting equipment; a database engine connected to said database for determining a first level for said painting response based upon said factor-response function of said model and upon a first level of said painting factors; and a cooptimizer connected to said database engine for determining a second level for said painting response based upon said factor-response function of said model and upon a second level of said painting factors which produces the desired level of said painting response; whereby said painting equipment is controlled based upon said second level of said painting factors which produces the desired level of said painting response.