RAND function, 469
Random arrivals, 430, 440
Random (R) component, of time-series, 150
Random errors, 113
Random numbers, 464, 469, 474, 479, 480, 484
generating, 465–466
generating in Excel, 471
Random variables, 30–31, 32, 33, 40
Random variations, 154, 167
Range charts, 536–537
Ranking goals with priority levels, 371
Raw data, 2
Raw materials, 187, 269
Ray Design, Inc., 332–334
R-charts, 532, 535, 537
Receipt of inventory, 189
Recovery, 5
Red Top Cab Company c-chart example, 540–541
Redundancy, 261, 262–263
Regression
calculations in formulas, 145–146
cautions and pitfall, 134–135
coefficients of, 119
computer software, 122–126
least squares, 113, 163
measuring fit of, 114–117
multiple regression model, 126–129
nonlinear, 131–134