Question

AUS. Postal Service supervisor is looking for ways to reduce stress in the sorting department. With the existing a angement, stamped letters are machine-canceled and loaded into tubs with 400 letters per tub. The tubs are then pushed to postal clerks, who read and key zip codes into an automated sorting machine at the rate of one tub per 250 seconds. To overcome the stress caused when the stamp canceling machine outpaces the sorting clerks, a pull system is proposed. When the clerks are ready to process another tub tub from the canceling machine area. How many tubs should circulate between the sorting clerks and the canceling machine if 95,000 letters are to be sorted during a 12-hour shift, the safety stock policy variable, a, is 0.15, and the average waiting time plus material handling time is 20 minutes per tub? mail, they will pull the The average processing time per tub of letters, p, is day. (Enter your response rounded four decimal places.) day. (Enter your response rounded to four decimal places.) The average waiting time per tub of letters, w, is tubs. (Enter your response rounded up to the next whole number) Therefore, the number of tubs that should circulate between the sorting clerks and the canceling machine is

Answer 1

SH2019 Anscwer Guven data average processi ng time per tubin Priction P The L1a 60* 60) OP days 0 0057 tme per tub - 20 (12* 60) NNAverage coaitin C Quantity peo tub - 40D dail demand d 45, 000 Op tobs reguired oili be Aiven by SOthe mumber follouorng x presion: the k d Cun+p~) (+)c -96,000 (o0a 00057) (1 t0 15) Ju00 - 269.& oP tubs required will be 9. So te number 2/2.