R and Xbar chart
advantages and disadvantages of, 133
causes that affect, 216, 218 “220
construction of, 133 “145
control limits, 134 “135
illustration of, 237
moving range chart vs., 145 “146
nominal, 278 “279
process control, 136 “137
sampling frequency and size , 133 “134
short-run, 281 “282, 293
short-run statistical process control, 278 “279
target, 280 “281
vertical scale, 136
Rational samples, 118 “119
Red bead experiment, 111 “113
Regression tests
Shapiro-Wilk W test
for exponentiality, 83 “85
for normality, 83
underlying distribution detection using, 82 “83
Reliability and maintainability
description of, 34 “35
problem solving using, 34 “35
Repeatability errors
definition of, 323 “324
spread caused by, 339
standard deviation calculations, 351, 354
tolerance caused by, 339 “340
variation caused by, 338, 352
Reproducibility errors
description of, 323 “325
spread caused by, 339
tolerance caused by, 340
variation caused by, 338 “339
Runs
statistical analysis of, 225 “227
test of, 221 “222