me delay in getting the material moved to t the job can begin promptly. Choi is
ID: 375008 • Letter: M
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me delay in getting the material moved to t the job can begin promptly. Choi is interested i ut there seems the work cells so to be son h delay there is on the part of his highly paid mac he delay would be close to zero. He has aske e. to determine the delay factor among his 10 work cell ist ercent San- time lly, t ollects the data on a random basis over the next 2 eektant and dete hat of' the 1,200 observations, 105 were made while t oper ators were waiting for materials. Use a 95% confiden ine ±3% acceptable error, what report does he give to Choi? 10.38 Green Active sports center has 30 grass tennis cou The courts need to be watered every day, and the grass sho be cut regularly (usually once a week). If a court is n uld m booke match, it should be prepared a day in advance (in terms lining, net. resting benches, etc.) The court maintenance team works eight hours a day. They start their work at 8 A.M. and finish at 4 P.M. They have a 45-minute lunch break, a 15-minute coffee break in the morning, and a 15-minute coffee break in the afternoon. It also takes them 15 minutes to wear the work gear in the morning and 15 minutes to take off and clean them in the afternoon. Another 45 minutes (on average day are usually spent to move between different tennis court Watering the court takes one hour of one maintenance team member's time. Cutting the grass requires one person for one hour, and preparation also requires one member of the mainte- nance team for one hour. a) How much actual time does each member of the maintenance team has for watering, grass-cutting, and preparing the tennis b) If five of the courts should be ready for a tournament tomorrow and 12 of them need grass-cutting, how much time does Green Active sport center need today for regular maintenance of the courts as well as making five of them ready for tomorrow?5 c) According to the workload calculated in part (b), how many people does the maintenance team need today? d) If all the courts were supposed to be ready for the tournament tomorrow, how many people would be needed by the mainte- nance team? Additional problems 10.39-10.46 are available in My OMLabExplanation / Answer
(a). Total Time in the Day = 8 hrs = 8*60 = 480 min.
Total Time required for other tasks = 45+15+15+15+15+45 = 150
Total Time to prepare court = 480-150 = 330 min
(b). Time Required for watering all 30 courts = 30 hrs
Time Required for grass cutting of 12 courts = 12 hrs
Time required for 5 courts to make them ready for tournaments = 5 hrs
Total Time required for all above task = 30+12+5 = 47 hrs
(c). If all the courts need to be ready match tomorrow than time is 30 hrs for watering + 30 hrs for preparing + 30/6 hrs for grass cutting
total = 30+30+5 = 65 hrs
(d). Total workforce required = 65*60/330 = 11.81 = 12 maintence workers are required if all the courts should be ready for tournament tomorrow.
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