how the animation controller work if more than one parameter seted

currently i meet a problem, sometimes the animation doesn't play corrently,i create the animation controller and added some parameters, i want to know if i set more than one parameter at the same time, how does the controller work, which one will play first. because in my project , some parameters are seted by some trigger, so sometimes more than one parameter will be set,and i believe this lead to the problem.