Question: A 2-station flow system operates with m = 1 each. Jobs arrive every 5 minutes on average with CV 1.2. The service rate of the first station is 15 per hour with CV 0.5, and the service rate of the second station is 20 per hour with CV 0.75. What is the wait time on average for the second station? a. b. \- r Assume that the job arrival rate is now 15 per hour, and that the second station has a limited queue size of 6. What are the throughput and cycle time for the line now?

Question: A 2-station flow system operates with m = 1 each. Jobs arrive every 5 minutes on average with CV 1.2. The service rate of the first station is 15 per hour with CV 0.5, and the service rate of the second station is 20 per hour with CV 0.75. What is the wait time on average for the second station? a. b. \- r Assume that the job arrival rate is now 15 per hour, and that the second station has a limited queue size of 6. What are the throughput and cycle time for the line now?

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.5: Quality Assurance, Process Planning, And Quality Control

Problem 10RQ: If an X-bar chart graph falls below the LCL or rises above the UCL, a machining process is said to...

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If you give wrong answer - i will report you... and dislike this Q1. You are analyzing a process with an average processing time of 1 minute and an interarrival time of 10 seconds. There are 7 servers and CVa is 1.3 and CVp is .80. What is average time in queue? What is the average total flow time? Answer both parts correct to get upvote.
The three-station work cell at Pullman Mfg., Inc. is illustrated in the figure below. It has two machines at station 1 in parallel (i.e., the product needs to go through only one of the two machines before proceeding to station 2). 30 min/unit Station 1 Machine A Station 2 Station 3 Station 1 3 min/unit 2 min/unit Machine B 30 min/unit a) The throughput time is minutes (enter your response as a whole number). b) The bottleneck time of this work cell is minutes per unit (enter your response as a whole number). c) is the bottleneck station d) If the firm operates 8 hours per day, 6 days per week, the weekly capacity of this work cell is units (enter your response as a whole number).
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Following data refers to the jobs (P, Q, R, S) which have arrived at a machine for scheduling. The shortest possible average flow time is days. Job Processing Time (days) 15 9. 22 12 ORS
= Consider a four aisle AS/RS in which an S/R machine is used for each aisle. The length of the storage aisle 85 m and its height = 14 m. Suppose horizontal and vertical speeds of the S/R machine are 61 m/min and 23 m/min, respectively. The S/R machine requires 20 s to accomplish a P&D operation. The aisles in the AS/RS will be organized to follow a class-based dedicated storage strategy. There will be two classes, according to activity level. The more active stock is stored in the half of the rack system that is located closest to the input/output station, and the less active stock is stored in the other half of the rack system farther away from the input/output station. Within each half of the rack system, random storage is used. The more active stock accounts for 80% of the transactions, and the less active stock accounts for the remaining 20%. Assume that system utilization = 90%, and the number of single-command cycles = the number of dual-command cycles. Determine the throughput…
1. A certain batch of parts is routed through six machines in a batch production plant. The setup and operation times for each machine are given in the table below. Batch size is 200 and the average nonoperation time per machine is15 hr. Determine (a) manufacturing lead time and (b) hourly production rate for operation 4.Machine 1 2 3 4 5 6Setup time (hr) 5 3 6 4 5 3Operation time (min) 3.0 3.3 8.2 3.9 4.5 2.3 a. 6(4.3+200(3.9/60)+15) = 193.8 hours 24.2 days if 8 hour shiftb. 4(60)+200(3.9)/200 =5.1 hourly production for operation 4 2. Suppose the part in the previous problem is made in very large quantities on a production line in which an automated work handling system is used to transfer parts between machines. Transfer time between stations is 30 sec. total time required to setup the entire line is 102 hr. Assume that the operation times at the individual machines remain the same as in the previous problem, Determine (a) manufacturing lead time for a part coming off the line,…
Two models of controlling boards. The 1* type has high specification for work from the 2nd type. The better type has a profit of 50$ and the other 40$ per board. The 1st type of boards requiring five as much as the 2nd needs for production and the total production are 2000 boards, the first model requires 400 min to be complete and 700 min to the second model. Write this expression with LP equations to have the maximum profit with production of each model.
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.
In a manufacturing company, the routing of part A is started from machine X, and continued by machine Y, and then machine Z, and 23,000 parts must be produced per month. The routing of part B is machine Y, Z, and X, respectively, and 31,000 parts must be produced per month. Set up time for machine X, Y, and Z are 35, 55, and 45 minutes, respectively. If the company works 6 days a week, four weeks a month, 10 hours a day, with 45 minutes lunch break and two breaks of 20 minutes, and given the following information. How much is the available processing time for Machine X (to process both parts A and B in total)? Machine X Machine Y Machine Z Standard time 7 min 3 min 9 min Part A Scrap estimate 3% 2% 2.5% Standard time 5 min 8 min 6 min Part B Scrap estimate 2% 4% 3% Historical Efficiency 92% 96% 89% Reliability factor 87% 91% 88%
In a manufacturing company, the routing of part A is started from machine X, and continued by machine Y, and then machine Z, and 23,000 parts must be produced per month. The routing of part B is machine Y, Z, and X, respectively, and 31,000 parts must be produced per month. Set up time for machine X, Y, and Z are 35, 55, and 45 minutes, respectively. If the company works 6 days a week, four weeks a month, 10 hours a day, with 45 minutes lunch break and two breaks of 20 minutes, and given the following information. What is the machine fractions of Y to produce parts A and B? Machine X Machine Y Machine Z Standard time 7 min 3 min 9 min Part A Scrap estimate 3% 2% 2.5% Standard time 5 min 8 min 6 min Part B Scrap estimate 2% 4% 3% Historical Efficiency 92% 96% 89% Reliability factor 87% 91% 88%
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