Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] UCLs (upper control limits) UDEs (undesirable effects) UML (Uniform Modeling Language) uncontrollable factors Understanding Media undesirable effects (UDEs) Uniform Modeling Language (UML) unintended function failure mode unique SLOC unit testing Univac 1107 computers Univac 1108 computers Univac Defense Systems Universal Studios robotic triceratops project [See MD Robotics case study.] unnecessary motion unnecessary transportation unrefusable offers (UROs) unreliability, causes of unstated requirements upper control limits (UCLs) upstream internal failure costs upstreaming URO (unrefusable offer) usability use cases users expectations interaction with obtaining input from |