The Omega Manufacturing Company has discontinued the production of a certain unprofitable product line. This act cre- ated considerable excess production capacity. Management is con- sidering devoting this excess capacity to one or more of three prod- ucts; call them products 1, 2, and 3. The available capacity on the machines that might limit output is summarized in the following table: Available Time Machine Type (Machine Hours per Week) Milling machine 500 Lathe 350 Grinder 150 The number of machine hours required for each unit of the re- spective products is Productivity coefficient (in machine hours per unit) Machine Type Product 1 Product 2 Product 3 Milling machine Lathe 3 5 5 4 Grinder 3 2

The Omega Manufacturing Company has discontinued the production of a certain unprofitable product line. This act cre- ated considerable excess production capacity. Management is con- sidering devoting this excess capacity to one or more of three prod- ucts; call them products 1, 2, and 3. The available capacity on the machines that might limit output is summarized in the following table: Available Time Machine Type (Machine Hours per Week) Milling machine 500 Lathe 350 Grinder 150 The number of machine hours required for each unit of the re- spective products is Productivity coefficient (in machine hours per unit) Machine Type Product 1 Product 2 Product 3 Milling machine Lathe 3 5 5 4 Grinder 3 2

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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Consider a line consisting of only one machine. This machine takes on average 4 minutes (te=4 min) to complete a job and Ca2=Ce2=1. The arrival rate of the parts to this machine is 1/8 part/minutes. Assume that there is enough space for only 5 parts between the machines (Hint: the buffer size, b, is 5.) Compute the expected CT of this production line. CT=_________
7. What is the difference between a basic process and a secondary process? 8. What is a route sheet?
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Consider machine A with to = 1 hour, co = 0.25, Ng = 100 jobs/setup, ts %3! %3D %3D 3 hours, c, = 0.5; and machine B with to = 1.5 hour, co = 0.2, N, = 120 jobs/setup, ts = 5 hours, cs = 0.2. Compute te, re, de, Ce for both machines. Which machine has higher r, and which machine has lower c,? %3!
Karl Knapps, Inc., has received the following orders: Period 1 2 3 4 5 6 7 8 9 10 Order size 0 40 30 40 10 70 40 10 30 60 The entire fabrication for these units is scheduled on one machine. There are 2,250 usable minutes in a week, and each unit will take 65 minutes to complete. Develop a capacity plan, using lot splitting, for the 10-week time period.
Table 3 shows the process sequence in a production line and its related direct time study data. The production process must follow a specific route of processes A, B, C, and D respectively. Task A is in full automatic mode and requires one operator at the workstation. The worker at task B was rated with 90%, the worker at task C was rated with 115% and the worker at task D was rated with 80%. The standard allowances accepted by the company are 6% for fatigue, 5% for personal, and 4% for delay. The normal operating period is 8 hours per day and 24 days per month. Analyse the given information and determine the standard time for the product in minutes. Table 3: Average Processing Time (minutes) Job Description Average Processing Time A Automatic B Manual 40 C Manual 30 D Manual 35
Operations processes are known to differ in terms of volume of their output. Explain thecharacteristics of high volume operations.
a) With the aid of diagrams describe how a production plan is generated for a traditional 'push' planning and control system and compare this to a 'pull' system b) In terms of machine utilisation, discuss the benefits and drawbacks of each? c) Calculate the number of Kanbans and inventory level given the following information. Utilisation rate R =700/hr Delay time T = 35mins Capacity C = 100 units Operation Variation X = 25% d) The following options have been proposed to reduce the inventory level for the situation outlined in Q4c. • Option A: The delay time T is halved (T/2) Option B: Capacity C is increased to 200 units Option C: X becomes 12.5% Calculate the number of Kanbans and Capacity for each option and select the best option. Which option did you choose and why? (All calculations must be shown to gain full marks)
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What are the four basic parts of a process plan?
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