Operations Research Quiz
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Questions and Answers

What is the total weight of the assessment in the course?

  • 190 degrees
  • 120 degrees
  • 180 degrees
  • 150 degrees (correct)

In which week is the first quiz scheduled?

  • Week 5 (correct)
  • Week 9
  • Week 7
  • Week 3

What is the title of the book by JURAJ STACHO?

  • Elementary Linear Programming with Applications
  • Introduction to Operations Research
  • Operations Research: Applications and Algorithms
  • Introduction to Operations Research Deterministic Models (correct)

Who is the instructor of the course OR IS 231?

<p>Dr. Esmat Mohamed Abdel Moniem (C)</p> Signup and view all the answers

What is the weight of the final exam in the course?

<p>90 degrees (C)</p> Signup and view all the answers

How many degrees are allocated to each of the two quizzes?

<p>30 degrees (B)</p> Signup and view all the answers

Which of the following is NOT a type of OR technique?

<p>Economics (A)</p> Signup and view all the answers

What is the primary concern in the first step of the OR methodology?

<p>Defining the problem objectives (C)</p> Signup and view all the answers

At which step in the OR methodology do you determine how to collect data?

<p>Step 2: Determining the data to be collected (A)</p> Signup and view all the answers

What is the main goal of the seventh step in the OR methodology?

<p>To validate the model's accuracy (D)</p> Signup and view all the answers

Which of the following is a step in the OR methodology?

<p>Understanding the system's interactions (D)</p> Signup and view all the answers

What is the purpose of feedback loops in the OR methodology?

<p>To facilitate iteration and improvement at all levels (D)</p> Signup and view all the answers

What is the primary concern in the fourth step of the OR methodology?

<p>Choosing the right model (D)</p> Signup and view all the answers

What is the main purpose of the OR methodology?

<p>To conduct a thorough analysis of a problem and develop a solution (D)</p> Signup and view all the answers

What is the primary goal of communicating results in OR analysis?

<p>To convey complex ideas in layman's terms (B)</p> Signup and view all the answers

Which of the following is a crucial step in ensuring the success of an OR system?

<p>Training users on the new system (D)</p> Signup and view all the answers

What is the primary benefit of using queuing models in OR analysis?

<p>To improve system efficiency and reduce waiting times (D)</p> Signup and view all the answers

Which company used integer programming to assign planes to routes?

<p>Delta Airlines (C)</p> Signup and view all the answers

What is the estimated annual savings from the successful OR application at Hewlett Packard?

<p>$280 million (B)</p> Signup and view all the answers

Which of the following is a key aspect of the methodology of Operations Research?

<p>Communicating results in layman's terms (D)</p> Signup and view all the answers

What is the primary purpose of observing a system over time in OR analysis?

<p>To ensure the system works properly and efficiently (B)</p> Signup and view all the answers

Which of the following techniques was used in the successful OR application at Yellow Freight Systems?

<p>Network models (B)</p> Signup and view all the answers

Flashcards

OR IS 231

A course providing an introduction to Operations Research.

OR Techniques

Linear Programming, Integer Programming, Multi-criteria Decision Making, Network Modeling, Decision Analysis, Simulation, Forecasting, Markov Process, PERT/CPM, Inventory System, Queuing System.

Operations Research

A systematic approach to solve complex problems using mathematical and computational methods.

OR Analysis Steps

  1. Define problem/objectives; 2. Determine data; 3. Choose model; 4. Develop model; 5. Test model; 6. Implement; 7. Monitor.
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Define the Problem

The first step in OR methodology, focusing on understanding the problem and setting goals.

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Taco Bell's OR Success

Optimizing employee scheduling. Used IP, Forecasting and Simulation.

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AT&T's OR

Designing call centers with queuing models and simulation.

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Proctor & Gamble's OR

Used transportation models to redesign production and distribution system.

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Delta Airlines' OR

Assigning planes to routes.

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Yellow Freight Systems' OR

Designing trucking network with network models.

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Modeling

The process of creating a simplified representation of a real-world system to analyze and predict its behavior.

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Linear Programming

A type of mathematical model where the objective function and constraints are linear.

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Integer Programming

A type of mathematical model where the decision variables are restricted to integer values.

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Multi-Criteria Decision Making

Involves evaluating multiple conflicting criteria in decision-making processes.

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Network Modeling

A visual representation of interconnected nodes and links, used to model relationships and flows.

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Decision Analysis

A systematic approach to making decisions under conditions of uncertainty.

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Simulation

A technique that uses computer models to imitate real-world processes and predict their behavior.

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Forecasting

Predicting future outcomes based on historical data and trends.

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Markov Process

A mathematical model that describes the sequence of possible events in a system where the probability of each event depends only on the state attained in the previous event.

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PERT/CPM

Project management techniques used to plan, schedule, and control projects.

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Inventory System

Managing the flow of goods to meet customer demand while minimizing costs.

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Queuing System

Analyzing waiting lines and service systems to optimize resource allocation and minimize wait times.

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Study Notes

Introduction to Operations Research

  • OR IS 231 is a course that covers the introduction to Operations Research.
  • The course is taught by Dr. Esmat Mohamed Abdel Moniem El Sayed at Misr University for Science and Technology, Faculty of Information Technology, Department of Information Systems.

Grading

  • The course assessment is based on the following weights:
    • Quiz 1: 30 degrees (Week 5)
    • Quiz 2: 30 degrees (Week 10)
    • Final Exam (written): 90 degrees (Week 16)
    • Total: 150 degrees

Text Books

  • The course uses the following textbooks:
    • Hiller Liberman, "Introduction to Operations Research", 9th Ed., Mc Graw Hill, 2010
    • Wayne L. Winston, "Operation Research: Applications and Algorithms", 9th Edition, Duxbury Press, Boston 2013
    • Bernard Kolman & Robert E. Beck, "Elementary Linear Programming with applications", 8th Edition Academic Press Inc., New York, 2013
    • Other textbooks mentioned

OR Techniques

  • The course covers the following OR techniques:
    • Linear Programming
    • Integer Programming
    • Multi-criteria Decision Making
    • Network Modeling
    • Decision Analysis
    • Simulation
    • Forecasting
    • Markov Process
    • PERT/CPM
    • Inventory System
    • Queuing System

Methodology of Operations Research

  • The Seven Steps to a Good OR Analysis are:
    • Define the problem and objectives
    • Determine the type of data to be collected and how to collect it
    • Choose a model and determine its accuracy
    • Develop the model and choose decision variables
    • Test the model and validate its results
    • Implement the model and communicate results
    • Monitor and evaluate the system over time

Successful OR Applications

  • Examples of successful OR applications include:
    • Hewlett Packard (1998): Used queuing models to design buffers into production line, resulting in $280 million in annual savings
    • Taco Bell (1998): Used IP, Forecasting, and Simulation to optimize employee scheduling, resulting in $13 million in annual savings
    • Proctor & Gamble (1997): Used transportation models to redesign production and distribution system, resulting in $200 million in annual savings
    • Delta Airlines (1994): Used Integer Programming to assign planes to routes, resulting in $100 million in annual savings
    • AT&T (1993): Used queuing models and simulation to design call center, resulting in $750 million in annual savings
    • Yellow Freight Systems, Inc. (1992): Used network models to design trucking network, resulting in $17.3 million in annual savings

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Description

Introduction to Operations Research, covering lectured materials from Dr. Esmat Mohamed Abdel Moniem El Sayed at Misr University for Science and Technology. Assessment of understanding of key concepts in Operations Research.

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