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- TIme lert 1:08:20 tion A local toy manufacturer is using a production line that runs 8 hours per day and produces a toy that requires a total of 7 tasks to be performed. The daily demand is 120 toys. Times of the tasks are 2.73, 2.01, 2.13, 2.0, 2.61, 2.71, and 2.95 minutes for A, B, C, D, E, F, and G, respectively. However, due to the nature of the product there are precedence rules that must be observed. Such that Task A does not need any predecessors; task B requires task A to be completed. To start task C and task D, each require task B to be completed. Task C must be completed prior to stating task E. Task F needs both task D and task E to be completed. Finally, task G can out of start only once task F is completed.What is the minimum number of workstations needed? O a. 8 O b. 6 O c. 5 O d. None of them e. 4 Fir NEXT PAGE EVIOUS PAGEThe following jobs are waiting to be processed at JulieMorel’s machine center:JOB DATE ORDER RECEIVED PRODUCTIONDAYS NEEDED DATE ORDER DUEA 110 20 180B 120 30 200C 122 10 175D 125 16 230E 130 18 210 In what sequence would the jobs be ranked according to the fol-lowing rules: (a) FCFS, (b) EDD, (c) SPT, and (d) LPT? All dates are according to shop calendar days. Today on the planning cal-endar is day 130, and none of the jobs have been started or sched-uled. Which rule is best?The times required to complete each of eight jobs in a two-machine flow shop are shown in the table that follows. Each job must follow the same sequence, beginning with machine A and moving to machine B. TIME (hours) Job Machine A Machine B a 16 5 b 3 13 c 8 7 d 9 6 e 2 14 f 14 4 g 18 14 h 20 11 Find machine B’s idle time For the sequence determined in part a, how much would machine B's idle time be reduced by splitting the last two jobs in half?
- I only need help with question 4, but question 3 explains how to do 4 but I'm lost. I already have question 3 done. 3. Sequence the jobs shown below by using a Gantt chart. Assume that the move time between machines is one hour. Sequence the jobs in priority order 1, 2, 3, 4. Job Work Center/Machine Hours Due Date (days) Job 1 A/3, B/2, C/2 Job 2 C/2, A/4 Job 3 B/6, A/1, C/3 Job 4 C/4, A/1, B/2 a. What is the makespan? b. How much machine idle time is there? c. When is each job delivered compared with its due date? d. How much idle time (waiting time) is there for each job? e. Devise a better job sequence for processing. 4. In problem 3, assume there are two machines of type A, two of type B, and two of type C. a. Prepare a finite capacity schedule. b. Compare the FCS to the Gantt chart in problem 3.Eddys Pizza is currently redesigning its order-processing and pizza-making procedures for itsoperations which usually start at 5pm and close at 2am. For Eddys to meet customers’ speedydelivery requirement, six elements must be completed as summarised in the table below.WorkElementDescription Precedence Time (Mins)1 Receive customer order - 32 Shape dough 1 23 Prepare toppings 1 34 Assemble Pizza 2, 3 45 Bake pizza 4 46 Select complementary drink - 17 Deliver pizza 5, 6 4i. Draw the precedence diagram for the pizza making process.ii. If the demand for pizza is 90 pieces during the operating time, calculate the desired cycletime iii. Balance the line and calculate its efficiency6. (Ch10) Job A B с D E F Process Time (days) 2 8 4 10 5 12 Due Time (days) 7 16 4 17 15 18 Days Since Arrival 12 9 8 5 3 2 Use the information in the preceding table and sequence the six jobs using FCFS and EDD. The jobs are listed in the order of their arrival. Calculate the average flow time and average past due. It is now time zero.
- Provide the difference between Slack time and Cycle-time efficiency. There are how many ways to compute the Cycle time? Explain only one way.6.16: Complete the following table to determine the run sequence for each of the sequencing rules: Job Process Arrival Due Operation Sequencing Rule Date Due Date A B D Time Date (days) 5 2 3 5.0 123 124 131 132 142 144 140 146 132 131 129 135 FCFS EDD ODD SPTThe operations manager of a body and paint shop has five cars to schedule for repair. He would like to minimize the makespan to complete all work on these cars. Each car requires body work prior to painting. The estimates of the times required to do the body and paint work on each are as follows: Car A B C D E Body Work (hrs) 10 5 7 3 1 Multiple Choice Where in the optimum sequence should car A be scheduled? O O O O first second third fourth Paint (hrs) 2 4 fifth 5 6 7
- Fiona cleans offices. She is allowed 5 seconds per square foot. She cleans building A, which is 3,024 square feet, and building B, which is 2,424 square feet. Will she finish these two buildings in an 8-hour shift? Will she have time for a break? Round intermediate calculations to two decimals and final answer to whole number. (yes or no), she (will or will not) finish in an 8-hour shift, and she (can or cannot) have a break of _____ minutes.The following table contains information concerning four jobs that are awaiting processing at awork center.JobJob Time(days)Due Date(days)A 14 20B 10 16C 7 15D 6 17a. Sequence the jobs using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. Assume the list is by orderof arrival.b. For each of the methods in part a, determine (1) the average job flow time, (2) the average tardiness, and (3) the average number of jobs at the work center.c. Is one method superior to the others? Explain.Christine has three cars that must be overhauled by her ace mechanic, Megan. Given the following data about the cars. CUSTOMER PICK-UP REMAINING TIME (HOURS HENCE) OVERHAUL CAR TIME (HOURS) REMAINING OPERATION A 19 1 Painting Wheel alignment, painting Chrome plating, painting, seat B 26 2 14 2 repair Use least slack per remaining operation to determine Megan's scheduling priority for each. (Round your answers to 1 decimal place.) Slack Per Car Priority Remaining Operations A В C ם0 >>