Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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Chapter 8, Problem 20P
Summary Introduction
To determine: The way to achieve the earliest possible completion of jobs.
Introduction: The variation between the present value of the
Expert Solution & Answer
Explanation of Solution
Model:
Formulae to determine the model:
Solver parameter:
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A serial process has 5 steps – A (4), B(5), C(2), D(6), and E(3) – that have to be performed in this order. The numbers in parentheses are the times (in minutes) needed to process a unit. For each unit produced by this process, the process has a total idle time of:
Group of answer choices
1 min
10 mins
6 mins
3 mins
The single machine-scheduling problem consists of:
Select one:
None is correct
n jobs with the same single operation on each of the jobs.
n jobs with m operations on each of the jobs.
n jobs with different operations on each of the jobs.
Suppose that you are a manager in an organization and your staff required laptops for their routine work you have limited budget time and certain specifications required in laptops you have to solve this problem how can you solve this problem in a sequential manner?
Chapter 8 Solutions
Practical Management Science
Ch. 8.3 - Prob. 1PCh. 8.3 - Prob. 2PCh. 8.4 - Prob. 3PCh. 8.4 - Prob. 4PCh. 8.4 - Prob. 5PCh. 8.5 - Prob. 6PCh. 8.5 - Prob. 7PCh. 8.5 - In the lawn mower production problem in Example...Ch. 8.6 - Prob. 9PCh. 8.6 - Prob. 10P
Ch. 8.6 - Prob. 11PCh. 8.6 - Prob. 12PCh. 8.7 - Prob. 13PCh. 8.7 - Prob. 14PCh. 8.8 - Prob. 15PCh. 8.8 - Prob. 16PCh. 8.8 - Prob. 17PCh. 8.8 - Prob. 18PCh. 8.8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28PCh. 8 - Prob. 29PCh. 8 - Prob. 30PCh. 8 - Prob. 31PCh. 8 - Prob. 32PCh. 8 - Prob. 33PCh. 8 - Prob. 34PCh. 8 - Prob. 35PCh. 8 - Prob. 36PCh. 8 - Prob. 37PCh. 8 - Prob. 38PCh. 8 - Prob. 39PCh. 8 - Prob. 1CCh. 8 - Prob. 2C
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- An order for 200 units of a product is processed on work centers A and B. The set up time on A is 45 minutes and the run time is 5 minutes per piece. The set up time on B is 40 minutes and the run time is 8 minutes per piece. The wait time between the two operations is 2 hours. The move time between A and B is 15 minutes. Wait time after operation B is 1 hour and the move time into stores is 50 minutes. There is no queue at either work station. Calculate the total manufacturing lead time for the order.arrow_forwardSuppose that you are a manager in an organization and your staff required laptops for routine work. You have limited budget, time and specifications required in the laptops. You have to solve this problem. How can you solve the problem in a sequential manner?arrow_forwardModify the machine-to-job assignment model under the assumption that only three of the four jobs must be completed. In other words, one of the four jobs does not have to be assigned to any machine. What is the new optimal solution?arrow_forward
- A manufacturing plant produces a product 'A' that requires one unit of 'B' and ½ unit of 'C'. Each unit of 'B' is comprised of one unit of 'D', two units of 'E', and one unit of 'F'. Each unit of 'C' requires ½ unit of 'G' and three units of 'H'. The manufacturing lead times for the components are as follows: 'A' - two weeks, 'B' - one week, 'C' - two weeks, 'D' - two weeks, 'E' - three weeks, 'F' - one week, 'G' - two weeks, 'H' - one week. There are 20 units in stock for each of these components. 100 units of 'A' are needed for delivery in seven weeks: a) Develop the product structure and indexed bill of materials for the product. b) Create a gross and net requirements plan for the manufacturer of the product.arrow_forwardbama pie company's assembly line operations (the assembly line operates for six hundred minutes per day) comprise of eleven tasks, with the longest task time being 2.4 minutes and the shortest task time being 0.4 minutes; the sum of the task times is eighteen minutes. the firm is working on balancing its assembly line operations. the firm needs to produce 200 pies per day; to achieve this, the firm calculates the required cycle time as ---- minutes?arrow_forwardOne possible solution method for the machine-to job assignment problem is the following heuristic procedure. Assign the machine to job 1 that completes job 1 quickest. Then assign the machine to job 2 that, among all machines that still have some capacity, completes job 2 quickest. Keep going until a machine has been assigned to all jobs. Does this heuristic procedure yield the optimal solution for this problem? If it does, see whether you can change the job times so that the heuristic does not yield the optimal solution.arrow_forward
- A product is completed when 18 tasks are done. These tasks are assigned to 6 workstations (each workstation handling several tasks) in an assembly line set up. All workstations work the same amount of time (= cycle time), and move the (partial) product to the next workstation, and repeat this process. The last workstation generates the finished product. We need 1200 units made every day (= 8 hours). If we run this line with a cycle time of 0.3 minutes, what is the most amount of work (in minutes) that can be done on this product? (Give the answer with one decimal place)arrow_forwardConsider a two-step process that handles three types of customers. Each resourceis staffed by one employee. Type 1 customers spend 5 minutes at resource 1 and 2 minutesat resource 2. Type 2 customers also spend 5 minutes at resource 1, but spend 10 minutes atresource 2. Finally, type 3 customers spend no time at resource 1 and 8 minutes at resource2. Each hour, the demand is 10 customers of type 1, 4 customers of type 2, and 2 customers oftype 3. Where in the process is the bottleneck? What is the flow rate for each customer type?arrow_forwardDo not do this question: 7-14 The Electrocomp Corporation manufactures two electrical products: air conditioners and large fans. The assembly process for each is similar in that both require a certain amount of wiring and drilling. Each air conditioner takes 3 hours of wiring and 2 hours of drilling. Each fan must go through 2 hours of wiring and 1 hour of drilling. During the next production period, 240 hours of wiring time are available, and up to 140 hours of drilling time may be used. Each air conditioner sold yields a profit of $25. Each fan assembled may be sold for a $15 profit. Formulate and solve this LP production mix situation to find the best combination of air conditioners and fans that yields the highest profit. Use the corner point graphical approach. Do: 7-15 Electrocomp’s management realizes that it forgot to include two critical constraints (see Problem 7-14). In particular, management decides that there should be a minimum number of air conditioners produced in order…arrow_forward
- A manufacturing system is used to produce a product.Each unit of product must be processed sequentially through workstations.V -----> W -----> X -----> Y The processing time on each workstation are as follows:Workstation V, 11 minutes per unit,Workstation W, 6 minutes per unit,Workstation X, 19 minutes per unit,Workstation Y, 19 minutes per unit. The raw material is always available in the front of workstation V. The manufacturing system can produce __________ units in 27 hours. Use at least 4 decimals.You must show your calculation steps and brief explanation on your Excel spreadsheets.arrow_forwardConsider a manufacturing process depicted by the following flowchart. flowchart Station A has 3 parallel operators, A1, A2, and A3. Station C has 2 parallel operators, C1 and C2. Each unit only needs to be processed by one of the operators A1, A2 and A3. After being processed at Station B, a unit then needs to be processed by either C1 or C2. The process time of the individual operators are given as follows. A1, A2, and A3: 12 minutes B: 14 minutes C1 and C2: 6 minutes. The process initiates the production of a new unit every 18 minutes. What is the utilization of Operator C2 in percentage? Note: Provide a number without the % mark. Round your final answer to 2 decimal places if it is not a whole number.arrow_forwardBE Spreadsheet Mike Reynolds has four assignments due in class tomorrow, and his class times are as follows: Time 9 a.m. 12 p.m. 2 p.m. 5:30 p.m. Each class lasts one hour, and Mike has no other classes. It is now midnight, and Mike estimates that the marketing, finance, psychology, and OM assignments will take him one, four, five, and seven hours, respectively. Assume that all time till the last class begins can be spent on completing assignments but each assignment should be done till the time of the class on the same subject. (Mike can prepare assignments for the next classes during previous classes.) Use the Excel Sequencing template to determine how he should schedule the work. Use minus sign to enter negative lateness values, if any. Enter the half an hour value as 0.5, e.g., 3:30 p.m. should be entered as 15.5. If your answer is zero, enter "0". Round your answers for the due date, lateness, and tardiness to one decimal place. Round your answers for the average values to two…arrow_forward
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