Zach Snider Investigative Task: SPREAD OF DISEASE – The Task Disease can spread quickly without use of universal precautions. Suppose the spread of a direct contact disease in a stadium is modeled by the exponential equation P(t) = 10‚000/(1 + e3-t) where P(t) is the total number of people infected after t hours. (Use the estimate for e (2.718) or the graphing calculator for e in your calculations.) 1. Estimate the initial number of people infected with the disease. Show how you
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QUEUING THEORY INTRODUCTION Waiting lines are the most frequently encountered problems in everyday life. For example‚ queue at a cafeteria‚ library‚ bank‚ etc. Common to all of these cases are the arrivals of objects requiring service and the attendant delays when the service mechanism is busy. Waiting lines cannot be eliminated completely‚ but suitable techniques can be used to reduce the waiting time of an object in the system. A long waiting line may result in loss of customers to an organization
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Waiting line management: unit 11. The waiting line is a list of customers who remains waiting for getting certain goods or services from service center. Understanding waiting lines or queues and learning how to manage them is one of the most important areas in operation management. In organizations or in personal life‚ there are examples of processes which generates waiting lines or queues. Such waiting lines occur because the current services facility is insufficient to provide service at that
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Part 3 : Acquisition & Production Support. Ch.3 Demand Forecasting. Edited by Dr. Seung Hyun Lee (Ph.D.‚ CPL) IEMS Research Center‚ E-mail : lkangsan@iems.co.kr Demand Forecasting. [Other Resource] Definition. ․ An estimate of future demand. ․ A forecast can be determined by mathematical means using historical‚ it can be created subjectively by using estimates from informal sources‚ or it can represent a combination of both techniques. - 2 - Demand Forecasting. [Other
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Characteristics of a Queuing System Difficulty: Moderate 4) The average time each customer spends in the queue is referred to as: A) W B) Wq C) L D) Lq E) ρ Answer: B Page Ref: 377 Topic: Single-Server Queuing System With Poisson Arrivals and Exponential Service Times (M/M/1 Model) Difficulty: Moderate 5) In a drive-in fast food restaurant‚ customers form a single lane‚ place their order and pay their bill at one window‚ and then pick up their food at a second window. This queuing configuration
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Detecting Growth by Powers • Not all variables grow linearly or even exponentially over time. Some relationships are best described by x raised to a power. Area of a Circle = x 2 x 0 1 2 3 4 y 0 1 4 9 16 y= sq(x) Detecting Growth by Powers • Not all variables grow linearly over time. How can you tell? 1. Begin by investigating a scatterplot of the data. Is it clear what form best describes the growth trend? 2. Sometimes growth by powers looks like linear growth or even exponential growth. Find
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facility location e. job assignments Forecasts are usually classified by time horizon into three categories a. short-range‚ medium-range‚ and long-range b. finance/accounting‚ marketing‚ and operations c. strategic‚ tactical‚ and operational d. exponential smoothing‚ regression‚ and time series e. departmental‚ organizational‚ and industrial A forecast with a time horizon of about 3 months to 3 years is typically called a a. long-range forecast b. medium-range forecast c. short-range forecast d. weather
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SCM 485 Exam 1 Review Forecast Notes Supply Chain Management Sequence of activities and organizations involved in producing and delivering a good or service SCM Define by Council of Supply Chain Management Professionals (CSCMP) Supply Chain Management encompasses the planning and management of all activity involved in sourcing and procurement‚ conversion‚ and all logistics management activities. Importantly‚ it also includes coordination and collaboration with channel partners‚ which can
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X is period) MAD ≈ 32.403 Exponential Smoothing or ES (adjusted for trend and seasonality) MAD ≈ 13.258 6 Q2: Forecast for January – April 2012 Month Mean Base Period MR SR ES January 0.61 49 825.27 745.12 720.56 February 0.88 50 1107.05 1082.68 1039.50 March 0.87 51 1105.66 1078.04 1027.69 April 1.05 52 1296.43 1310.32 1240.31 7 Q3: Best Forecast: Exponential smoothing forecast has lowest MAD Disadvantages: the exponential smoothing forecast should be updated
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| Chapter 14 Questions | | 3. Many companies take customer orders via Web sites. Put yourself in the place of the person at Ford Motor Company considering this approach to taking customer orders for the Ford Explorer sport utility vehicle. | What information would you need to collect from the customer? | I would collect information on the exact specifications of the Ford Explorer such as Model Year‚ engine capacity‚ interior finishing‚ power windows‚ power steering‚ and any luxury
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