What is the test for dismissing a case for failure to prosecute?

In considering whether to dismiss the case for failure to prosecute, a court ordinarily considers five factors: "(1) the public's interest in expeditious resolution of litigation; (2) the court's need to manage its docket; (3) the risk of prejudice to the defendants; (4) the public policy favoring disposition of cases on their merits and (5) the availability of less drastic sanctions." Omstead v. Dell, Inc., 594 F.3d 1081, 1084 (9th Cir. 2010) (quoting Henderson v. Duncan, 779 F.2d 1421, 1423 (9th Cir. 1986)). These heuristic factors merely guide the court's inquiry; they are not conditions precedent for dismissal. See In re Phenylpropanolamine (PPA) Products Liability Litig., 460 F.3d 1217, 1226 (9th Cir. 2006).