Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Time Lag Effects - Operations Function
Feedback control in complex systems can bring its own problems, due to time lag between measuring the output deviation and realising the effects of the corrective adjustments. A well-known illustration of this phenomenon was presented by Jay W Forrester in his book, Industrial Dynamics. He had been consulted by a white goods manufacturing concern which had been experiencing wildly fluctuating production levels over a period of years; despite the best efforts of the company's management they had been unable to keep production output in reasonable balance with customer demand. Forrester and his team studied the operations of the company's distribution chain (shown in simplified form in the figure) and formulated a computer simulation model of the factory - warehouse - distributor - retailers.
The figure below (adapted from Forrester, 1965) shows the results obtained when a 10 per cent step-increase in demand at the retail outlets was introduced. This chart is necessarily 'cluttered', to show how the various order, inventory and production levels changed in response to the initial increase in sales.
For our purposes it will be sufficient if you locate the two lines labeled 'Retail sales' and 'Factory production output'. It was found that, because of a series of time-lags in the chain, the feedback signal was greatly amplified by the time it reached the factory, resulting in over-reaction. Note that the production level climbs by 45 per cent, creating an excessive build up of inventories. In response the production level falls to 3 per cent less than the original level, and so on. It takes about 18 months for the fluctuations to be damped out.
Define the periodic inventory control systems. Periodic (or bin) Inventory Control Systems: Stock levels are reviewed at pre-found intervals of time and an order is posit
Soft Factors - Factors Affecting Productivity Improvement People are the most important factor in any organisation, not only by the way in which they apply themselves to their
Differentiate between validity and reliability of a selection test. In other words, provide definitions of (1) validity and (2) reliability of a test.
What are the legal and ethical ramifications for falsifying a resume?
Understanding or Knowing Customer - Customer Satisfaction and Service Quality Involves making the effort to understand the customer's needs. It involves: learning the customer
What would you suggest to companies on how to create a living, adapting marketing plan?
Select an article relating to workplace safety and answer the following questions: 1. briefly summarize the article 2. What alternatives could the place of business have taken in o
As the System Safety Engineer for your firm, you are writing a System Safety Working Group (SSWG) charter. List 6 individuals/functions you would include in this SSWG and the reaso
Race One Motors is an Indonesian car manufacturer. At its largest manufacturing facility, in Jakarta, the company produces subcomponents at a rate of 300 per day, and it uses these
1. When an organisation is stepping up production or availability of a service what are the dominant operations performance objectives? Answer: This is a very difficult questio
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd