ULAM, 24

Ulam, Stan, 463

Unboundedness, 261–262

Unconditional probabilities, 28

Uncontrollable inputs, 472

Uncontrollable variables, 4

Unfavorable market (UM), 66, 79, 83

Union of two events, 25

United Network for Organ Sharing (UNOS), 24

University of Maryland, College Park, 433

Unlimited calling population, 430

Unlimited queue length, 430

UNOS. See United Network for Organ Sharing (UNOS)

UPS optimization, 302

Urban government simulation, 462, 484–485

Usage curve, 189

U.S. Army simulation, 461

U.S. Defense Logistics Agency and inventory costs, 199

U.S. Department of Agriculture, 12

U.S. Department of Commerce, 444

U.S. Department of Energy (DOE), 93

U.S. Environmental Protection Agency, 538

U.S. Navy, 388

U.S. Postal Service (USPS), 362

U.S. Recommended Dietary Allowance (USRDA), 305–306

Utility assessment, 86–87

Utility curve, 87, 88

Utility theory, 86–91

Utility values, 86, 87, 88–91

Utilization factor, 435