 "United States v. Central Eureka Mining Co.", 357 U.S. 155, 168 (1958); see "United States v. Caltex, Inc"., 344 U.S. 149, 156 (1952).In engaging in these essentially ad hoc, factual inquiries, the Court's decisions have identified several factors that have particular significance.In making its decision, the Court would consider

These factors have been criticized because the court failed to provide guidance as to exactly what they mean, what must be proven to establish a taking using them as a test, and whether all three, two, or any one of them is sufficient to show a taking.