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The Case for Sampling for Production and Performance Analysis
Proof That Sampling Works
for lOOp 17 and n 200
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95 per cent accuracy application assigned average binomial binomial distribution cards cent confident Clerical cluster-minutes column computation control chart control limits cost Cumulative cycle Delay Observations determine distribution durations element percentages employees equipment established example Figure film formula frame intervals graph idle illustration indicated Industrial Engineering Inspection instants inventory machine maintenance material handling measurement memomotion ments method nomogram Nomograph Norbury normal number of observations number of readings obtained operation pace rating performance period planning pling point-hour population precision interval procedure production punch random minutes random numbers random sample random time sampling ratio delay record Rock Island Arsenal sample size Sampling Analysis Chart sampling error sampling study sampling techniques selected shows snap-reading standard deviation standard error statistical stopwatch supervisor taken tally tally marks time-study tion total number unit utilization variable worker