Thus, mandatory language in a statute or policy does not, standing alone, make an act ministerial. Titus Reg'l Med. Ctr. v. Tretta 180 S.W.3d 271, 275 (Tex.App.-Texarkana 2005, no pet.); Eakle v. Tex. Dep't of Human Servs., 815 S.W.2d 869, 876 (Tex.App.-Austin 1991, writ denied). Here, Appellees' summary-judgment evidence focuses on TDCJ's general policies and procedures for inmate housing assignments.