- A work operation consisting of three elements has been subjected to a stopwatch time study. The recorded observations are shown in the following table. By union contract, the allowance time for the operation is personal time 5%, delay 5%, and fatigue 10%. Determine the standard time for the work operation. Assignment 2 - A time study was conducted on a job that contains four elements. The observed times and performance ratings for six cycles are shown in the following table. a. Determine the average cycle time for each element. b. Find the normal time for each element. c. Assuming an allowance factor of 15% of job time, compute the standard time for this job. 7/11/2021 Assignment 3 Work sampling. An analyst has been asked to prepare an estimate of the proportion of time that a turret lathe operator spends adjusting the machine, with a 90 percent confidence level. Based on previous experience, the analyst believes the proportion will be approximately 30 percent. a. If the analyst uses a sample size of 400 observations, what is the maximum possible error that will be associated with the estimate? b. What sample size would the analyst need in order to have the maximum error be no more than 5 percent? p^=.30z=1.65for90percentconfidence Assignment 4 An analyst made the following observations about whether customer service representatives were busy (B) or idle (I): a. What is the percentage of idle time? b. Given these results, how many observations would be needed to estimate the actual percentage of idle time to within 6 percent with a confidence of 90 percent