A work sampling analyst decided to use the work sampling technique to establish time standards for the passport control of passengers at ERCAN AIRPORT. Four employees are involved in passport control operations. The data collected in this work sampling study are shown in the table below. Item Gokhan Ozgur Hasan Mehmet Total Total hours worked 6 6 6 6 24 Total observations 166 288 190 168 812 Working observations 118 248 149 141 656 Average rating 102 118 68 118

Q1. How many work sampling observations should be collected to estimate the percentage of working time for the group of employees listed in the table above (Use 10 % accuracy, and 95% confidence interval)? Hint: Sp =2 {p(1-p) / N}

Q2. During the work sampling period, 1370 passengers passed the passport control at ERCAN Airport. Use a 4 % for total allowances to determine a standard, in minutes for the passport control? Hint:

Standard Time = {(Total time) x (%working time) x (Performance Index)] / Number of units produced} {100 / (100 - % Allowances)}