A small manufacturing process consists of 2 single machine workstations as pictured below.Workstation 1Workstation 2The warehouse management system has collected data and the summary statistics computed.The average arrival rate to this process is 15 jobs and hour and the coefficient of variation of theinter-arrival times is 0.8. Workstation statistics are found in the following table:w/s 1w/s 23.75Average effective processing time (min)CV of processing times3.51.01.5What is the average time between job arrivals to w/s 2? What is the CV of these times?Compute the following:Average time jobs spend waiting in w/s 1Average time it takes to process a job in w/s 1Average time jobs spend waiting in w/s 2Average time it takes to process a job in w/s 2What is the average WIP in the entire system?

A small manufacturing process consists of 2 single machine workstations as pictured below. Workstation 1 Workstation 2 The warehouse management system has collected data and the summary statistics computed. The average arrival rate to this process is 15 jobs and hour and the coefficient of variation of the inter-arrival times is 0.8. Workstation statistics are found in the following table: w/s 1 w/s 2 3.75 1.5 Average effective processing time (min) CV of processing times What is the average time between job arrivals to w/s 2? What is the CV of these times? Compute the following: Average time jobs spend waiting in w/s 1 • Average time it takes to process a job in w/s 1 Average time jobs spend waiting in w/s 2 Average time it takes to process a job in w/s 2 What is the average WIP in the entire system? 3.5 1.0

A small manufacturing process consists of 2 single machine workstations as pictured below. Workstation 1 Workstation 2 The warehouse management system has collected data and the summary statistics computed. The average arrival rate to this process is 15 jobs and hour and the coefficient of variation of the inter-arrival times is 0.8. Workstation statistics are found in the following table: w/s 1 w/s 2 3.75 1.5 Average effective processing time (min) CV of processing times What is the average time between job arrivals to w/s 2? What is the CV of these times? Compute the following: Average time jobs spend waiting in w/s 1 • Average time it takes to process a job in w/s 1 Average time jobs spend waiting in w/s 2 Average time it takes to process a job in w/s 2 What is the average WIP in the entire system? 3.5 1.0

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1) An electric motor’s torque is a function of the speed at which it rotates. Many brushed AC motors have a linear toque curve as shown below. If the power output of the motor is equal to the torque (T) multiplied by the rotational speed in rad/s (w), what is the maximum power you can get out of the motor if the stall torque (Tstall) is 0.001 Nm and the no load speed (wno load) of 10,500 RPM? Give answer in Watts.
Q:01 Define manufacturing processes. Why we study manufacturing processes in the field of mechanical engineering?
A proposal has been submitted to replace a group of assembly workers, each working individually, with an assembly line. The following table gives the individual work elements. Element Te (min) Immediate predecessors 1 1.0 2 0.5 3 0.8 1,2 4 0.3 5 1.2 3 0.2 3,4 7 0.5 4 8 1.5 5,6,7 The demand rate for this job is 1600 units/week (assume 40 h/week) and the current number of operators required to meet this demand is eight using the individual manual workers. a) Construct the precedence diagram from the data provided on work elements. b) Use the (i) Kilbridge and Wester rule and (ii) ranked positional weights method to assign work elements to stations, respectively. c) What is the balance delay for the solutions? d) The initial cost to install the assembly line is $2,000,000. If the hourly rate for workers is $50.00/h, will the assembly line be justified using a 3-year service life? Assume 50 weeks/yr. Use a rate of return of 10%. 2.
A dealer of white goods buys washing machines from Arçelik. In their next order, they plan to buy two models for which the related data are as follows: Washing machine model 2. Annual demand (units) 6800 8500 Ordering cost (TL) 125 125 Unit purchasing cost (TL) 2400 1900 Transportation cost per unit (TL.) 250 220 The dealer has allocated a budget of 23,000 TL for the transportation of the machines from the factory. Assume that the anmual invontory carrying cost rate is 30 percent. Calculate the unconstrained order quantities. Are these values optimal? If not, determine the optimal quantities to be stored from each model (Hint: is 0.337)
Time (hours) 24 Order Step 1 Step 2 A 1.20 1.40 В 0.90 1.30 2.00 0.80 D 1.70 1.50 E 1.60 1.80 F 2.20 1.75 1.30 1.40 A wholesale grocery distribution system uses a two-step process to fill orders. Tomorrow's work will consist of filling the seven orders shown in table. Determine a job sequence that will minimize the time required to fill the orders (use Johnson's rule)
The gross requirements for item Z are specified for the beginning of weeks 1 through 8 in the table that follows. Gross Requirements for Item Z 1 2 3 6 7 8 Week 4 Gross Requirement 180 90 180 0 360 0 90 90 The lead time is 2 weeks. The current on hand inventory, at the beginning of week 1 is 360 units. If the order cost is $540 per order and the inventory cost is $3 per unit per period, and the order quantity is the computed part period (or a multiple of the computed part period) when it is necessary to place an order, what is the total cost for the 8 week period? Report as a whole number with no commas. Answer: The correct answer is: 4590
An electric motor's torque is a function of the speed at which it rotates. Many brushed AC motors have a linear toque curve as shown below. If the power output of the motor is equal to the torque (T) multiplied by the rotational speed in rad/s (w), what is the maximum power you can get out of the motor if the stall torque (Tstall) is 0.001 Nm and the no load speed (wno load) of 14,332 RPM? Give your answer in Watts. There are two ways to solve this: Use a stall torque and no load speed and plot the torque profile below and then plot the power versus rotational speed to find the maximum. The second method is to determine the mathematical relationship for power given the information at the start of the question and set the differential of power with respect to RPM equal to zero, and solve for the RPM to get the maximum. Tstall Wno load W
Three machines are used in a group-technology cell to process a family of five parts. Thetable below lists production quantities (Qj), production times (Tpij), and machine fractionsfor each family member (fij). Part E requires a changeover time of 5 min on each machine soit is produced in batches of 5 parts. Nonoperation times (Tno) are the same for all parts andmachines: 25 min per machine. Determine (a) average hourly production rate for the cell,(b) utilization of each machine and average utilization of the cell, (c) manufacturing leadtime, and (d) work-in-process. A spreadsheet calculator is recommended for this problem
The data provided by a company for the year 2020 – 2021 to carry out Break Even Analysis and provide them the results, complete analysis and suggestions. The data is as follows:Building rent 20000 R.O Every month instalments 30000 R.OThe estimated sales are 750000.0 R.OMaterial Cost / unit 15.0 R.OProduction cost / unit 8.0 R. OTransportation & other Costs / unit (Approx) 4.00 R. O Maintenance cost / unit 1.5 R. O Salary of the employees / unit 0.8 R.OMarketing and advertisement cost / unit 0.7 R. OEach unit is sold at price 35.0 R. O Construct the B.E.P chart on a graph sheet and indicate, B.E.P, M.o.S and also indicate the new B.E.P & M.o.S after the improvement measures has been taken (With different colours). Show the calculations for the following parameters separately before and after the measures taken.1. Determine the B.E.P2. Determine the profit 3. Margin of safety.Also write your decisions taken to improve the profits of the company and to reduce the B.E.P.
Consider the following tasks that must be assigned to four workers on a conveyor-paced assembly line (i.e., a machine-paced line flow). Each worker must perform at least one task. There exists unlimited demand unless stated otherwise. Time to Complete Task (seconds): Task 1: 30 Task 2: 25 Task 3: 15 Task 4: 20 Task 5: 15 Task 6: 20 Task 7: 50 Task 8: 15 Task 9: 20 Task 10: 25 Task 11: 15 Task 12: 20 The current conveyor-paced assembly-line configuration assigns the workers in the following way: • Worker 1: Tasks 1, 2, 3 • Worker 2: Tasks 4, 5, 6 • Worker 3: Tasks 7, 8, 9 • Worker 4: Tasks 10, 11, 12 What is the capacity of the current line (in units per hour)?
True, False or Uncertain. Explain your answer. Own wage elasticity JELLlincrease if product demand elasticity n? is high. In short run, when there is an increase in wage rate, each firm will hire less labor and so the industry labor demand is simply the horizontal summation of firm's labor demand. а. b. Labor demand is represented by the marginal revenue produce schedule (MRP) when we have competitive product market while it will be represented by the value of marginal product schedule (VMP) when we have a product market monopolist. When elasticity of substitution, SLK, increase that means the L and K are less substitutable, and the isoquant will be L-shaped. Minimum wage imposed by the government is always bad for the economy because it increase unemployment and deadweight loss. с. d. e. 3.
A time analyst observed a computer part assembly job for which the work methods have just been changed. The job is divided into four work elements. The element times (min) for first four cycles, recorded on a continuous basis, are shown in the following table with a performance rating (RF) for each element. Performance rating % (RF) Element Cycle 1 Cycle 2 Cycle 3 Cycle 4 1.38 1.60 1.71 1.49 100 2 0.25 0.35 0.30 0.56 120 3 0.65 0.58 0.54 0.57 105 4 0.75 0.81 0.74 0.88 90 (a) On the basis of the times observed through four cycles, determine the normal time for the job. (b) Calculate the standard time if there is a fatigue allowance of 15 % and a contingency allowance of 10%. (c) If a worker is employed on a 5 day, 37.5 hour/week with 1.5 hours per day for breaks, how many workers are needed for a daily production of 1500?