Question 1. Johnson's rule for operations scheduling Maria and Mary are machine operators who perform two consecutive operations in sequence: (1) sewing, and (2) ironing on eight jobs. The time required for performing these operations (in hours) on machine M1 (sewing) and M2 (ironing) respectively for each job are found as below. They would like to minimize the total time required to finish all the jobs. Apply the Johnson's Rule to determine an optimum sequence for them. Job A B с D E F G H M1 9 4 6 5 4 8 10 2 M2 3 7 5 10 5 2 8 4 Draw a Gantt chart of the optimum sequence and find the total completion time. Is there any alternative optimum sequence? If yes, list it out.

Question 1. Johnson's rule for operations scheduling Maria and Mary are machine operators who perform two consecutive operations in sequence: (1) sewing, and (2) ironing on eight jobs. The time required for performing these operations (in hours) on machine M1 (sewing) and M2 (ironing) respectively for each job are found as below. They would like to minimize the total time required to finish all the jobs. Apply the Johnson's Rule to determine an optimum sequence for them. Job A B с D E F G H M1 9 4 6 5 4 8 10 2 M2 3 7 5 10 5 2 8 4 Draw a Gantt chart of the optimum sequence and find the total completion time. Is there any alternative optimum sequence? If yes, list it out.

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

See similar textbooks

Similar questions

2. A small restaurant is creating a schedule for its wait staff to meet its expected weekly demand. The staff requirements have been determined to be: day monday tuesday wednesday thursday friday saturday sunday 1 staff 3. 3. The restaurant would like its staff to have two consecutive days off, with a preference given to Saturday and Sunday, or one of those two days if the pair is not possible. (a) Create a schedule to meet the staff requirements. How many wait staff are needed? (b) The restaurant believes regular maintenance of the kitchen is important. The kitchen staff would like 1 extra worker whenever they perform main- tenance. On which days of the week should maintenance be scheduled? (c) The restaurant wants to create a 'kid's day' (young children eat for free) to attract customers on days with low demand. Given your staff schedule, which day is best to implement this promotion.
In the winter, Scott works four 10-hour days instead of five 8-hour days, so he has a long weekend every week. In this way, Scott takes advantage of a ________. Question 38 options: A) shared work week B) flextime work week C) new-age work week D) compressed work week E) enriched work week
12 eBook References The owner/operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received: Job W X Y Z Processing Time (hrs) 4 3 2 1 Multiple Choice O If he uses the shortest processing time first priority rule to schedule these jobs, what will be the average completion time? 7.5 hours 5 hours 3 hours 2.5 hours Due (hrs from now) 2 hours 4 5 2 1
Question: The system provides some useful insights regarding the sales order. Different departments use this information. For instance, the production process uses this information to forecast the expected sale for next month. The production clerk uses this to create an online production schedule. From this schedule, the system automatically prepares weekly online work orders to be used by the production department. The production supervisor assesses the work orders from his terminal and prepares the necessary paper based move tickets and materials requisitions. Then, the move tickets and two copies of the materials requisitions are distributed to each work centre. Later, work center employees submit the two copies of the materials requisitions to the warehouse in exchange for materials and sub-assemblies. If additional new materials are needed beyond the standard quantity, the supervisor issues additional materials requisitions. Work centre employees record their work hours on…
33) Workstation #1 Given the following queue of 4 jobs to be processed at Workstation #1: Job Processing Time (Days) # Days Until Due A 5 12 B 11 20 C 7 10 D 9 14 In what sequence will the jobs be completed if the DDATE rule is used? Group of answer choices a) A-C-D-B b) C-A-D-B c) A-B-C-D d) C-D-A-B 34)What is the average completion time if the FCFS rule is used? Group of answer choices a) 76 b) 72 c) 31 d) 18 e) 19 f) 56
1. A municipal government wants to improve the efficiency of the local court system. It has collected data on the average length of time a particular judge requires to handle each type of case. Given the composition of the types of cases scheduled on each docket (the official schedule of proceedings in lawsuits pending in a court of law), the times shown in the table were estimated for each judge to process each different docket. Determine the assignment of judges to dockets to minimize the time required to complete all dockets. Judge gevej 2 3 4 5 A 13 20 18 25 15 B 17 15 21 20 18 Dockets C 21 15 18 17 20 hoversitorsak D 18 24 17 14 25 E 22 15 25 19 13
↓ The following jobs are waiting to be processed at a small machine center: JOB DUE DATE DURATION (DAYS) 10 260 18 20 252 10 30 260 28 40 50 265 270 4 24 All dates are specified as manufacturing planning calendar days. Assume that all jobs arrived on day 210 (yesterday) in the order shown but are not scheduled to begin until day 211 (today). a) Sequence the jobs according to LPT. According to the LPT rule, the sequence of jobs should be 30, 50, 10, 20, 40 b) What is the average completion (flow) time? The average completion (flow) time is days (round your response to one decimal place).
TB MC Qu. 16-80 The owner/operator of the local franchise of... The owner/operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received: Job W X Y Z Processing Due Time (hrs) (hrs from now) 5 4 T 4 5 2 2 1 1 If he uses the earliest due date first priority rule to schedule these jobs, what will be the average job tardiness? Multiple Choice O O O 3 hours 2 hours 0 hours 4 hours
Courtney is a programmer receiving requests each week to analyze a large data base. Five jobs were on her desk Monday morning, and she must decide in what order to write the code. Assume that all jobs arrived today (day 1 and hour 1), in the order shown below. Courtney has assigned the number of hours required to do the coding as noted. Note that Courtney works an 8-hour day and today is a work day. DURATION (HOURS REQUIRED) 14 7 2 JOB ABCDE DUE DATE (HOURS HENCE) 36 14 16 6 26 6 10 a) Sequence the jobs according to EDD. According to the EDD rule, the sequence of jobs should be D, B, C, E, A. b) What is the average completion (flow) time? The average completion (flow) time is 19.6 days (round your response to one decimal place). c) What is the average job lateness? The average job lateness is 0.6 days (round your response to one decimal place). d) What is the average number of jobs in the system? The average number of jobs in the system is jobs (round your response to one decimal…
using johnson's rule, what is the idle time at center 2 ? job D, e, f, g center 1: 13, 23, 16, 20 center 2: 14, 13, 18, 17
QUESTION #4 Four delivery trucks are in a queue at a Tool Company with only one service bay. The trucks are identified by the sequence in which they arrived at the Company. Assume the time is 10:00 a.m. The table shows the times necessary to unload each vehicle and the periods when the commodities they contain are expected in the factory. Determine the schedules that result for each of the rules SPE, CR EDD, and FSFC. In each case compute the average tardiness, the number of tardy jobs, and mean flow time. Truck 1 2 3 4 5 Unloading Time (minutes) 23 16 39 12 30 Time Material is Due 10:15 AM 10:40 AM 10:55 AM 10:30 AM 10:40 AM
at work center 27 2. The production manager at the Knox Machine Company is preparing a production schedule for mation on jobs currently waiting to be processed at this machine. (There are no other jobs, and one of the fabrication shop's machines, the P&W grinder. He has collected the following infor- the machine is empty.) Machine Processing Time, Days* Date Job Arrived at this Machine Job A B C D *Note: This is the final operation for each of these jobs. 4152 6-23 6-24 7-01 6-19 Job Due Date 8-15 9-10 8-01 8-17 The production manager has heard about three dispatching rules: the shortest operation next rule, the first-come/first-served rule, and the earliest due date rule. In what sequence would these jobs be processed at the P&W grinder if each rule were applied? b. If it's now the morning of July 10 and the shortest operation next rule is used, when would each of the four jobs start and be completed on the P&W grinder? (Express your schedule in terms of the calendar dates involved,…