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McGraw-Hill/Irwin Copyright © 2008, The McGraw-Hill Companies, Inc. All rights reserved.
Decision Support Systems
Decision Support Systems
Lecture
1
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� Identify the changes taking place in the form
and use of decision support in business
� Identify the role and reporting alternatives
of management information systems
� Describe how online analytical processing
can meet key information needs of managers
� Explain the decision support system conceptand how it differs from traditional management
information systems
Learning Objectives
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Learning Objectives
� Explain how the following information systems
can support the information needs of executives,
managers, and business professionals
� Executive information systems� Enterprise information portals
� Knowledge management systems
� Identify how neural networks, fuzzy logic,genetic algorithms, virtual reality, and
intelligent agents can be used in business
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Learning Objectives
� Give examples of several ways expert systems
can be used in business decision-making
situations
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Decision Support in Business
� Companies are investing in data-driven decision
support application frameworks to help them
respond to
� Changing market conditions� Customer needs
� This is accomplished by several types of
� Management information� Decision support
� Other information systems
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Case 1: Dashboards for Executives
� Web-based ³dashboards´
� Displays critical information in graphic form
� Assembled from data pulled in real time from
corporate software and databases� Managers see changes almost instantaneously
� Now available to smaller companies
� Potential problems
� Pressure on employees
� Divisions in the office
� Tendency to hoard information
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Case Study Questions
� What is the attraction of dashboards to CEOs
and other executives?
� What real business value do they provide
to executives?� The case emphasizes that managers of small
businesses and many business professionals
now rely on dashboards.
� What business benefits do dashboards provide
to this business audience?
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Case Study Questions
� What are several reasons for criticism of
the use of dashboards by executives?
� Do you agree with any of this criticism?
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Levels of Managerial Decision Making
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Information Quality
� Information products made more valuable bytheir attributes, characteristics, or qualities
� Information that is outdated, inaccurate, or
hard to understand has much less value� Information has three dimensions
� Time
� Content
� Form
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Attributes of Information Quality
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Decision Structure
� Structured (operational)� The procedures to follow when decision
is needed can be specified in advance
� Unstructured (strategic)� It is not possible to specify in advance
most of the decision procedures to follow
� Semi-structured (tactical)� Decision procedures can be pre-specified,
but not enough to lead to the correct decision
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Business Intelligence Applications
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DSS Model Base
� Model Base
� A software component that consists of
models used in computational and analytical
routines that mathematically express relations
among variables
� Spreadsheet Examples
� Linear programming
� Multiple regression forecasting
� Capital budgeting present value
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Simple examples of Math Modeling
� Estimate the yield of wheat in India from thestanding crop (without cutting and weighing thewhole of it)
� Estimating the population of India in the year
2025 (without waiting till then).� Estimate the average life span of a bulbmanufactured in a company (without lighting tillfused)
� Estimate the total amount of insurance claims acompany has to pay next year (without waitingtill the end of the year).
� Effect of Immigration and Emigration onpopulation size.
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Technique of Math Modeling
Real
Problem
Mathematical
Problem
Mathematical
Solution
Interpretation
Mathematical Physics
Mathematical Medicine (blood flow)Mathematical Economics
Mathematical Psychology
Mathematical Sociology
Mathematical Engineering
«
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Applications of Statistics and Modeling
� Supply Chain: simulate and optimize supplychain flows, reduce inventory, reduce stock-outs
� Pricing: identify the price that maximizes
yield or profit� Product and Service Quality: detect quality
problems early in order to minimize them
� Research and Development: improve quality,efficacy, and safety of products and services
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Management Information Systems
� The original type of information systemthat supported managerial decision making
� Produces information products that support
many day-to-day decision-making needs� Produces reports, display, and responses
� Satisfies needs of operational and tactical
decision makers who face structured decisions
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Management Reporting Alternatives
� Periodic Scheduled Reports� Prespecified format on a regular basis
� Exception Reports
� Reports about exceptional conditions� May be produced regularly or when an
exception occurs
� Demand Reports and Responses
� Information is available on demand
� Push Reporting� Information is pushed to a networked computer
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Example of Push Reporting
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Online Analytical Processing
� OLAP
� Enables managers and analysts to examine
and manipulate large amounts of detailed and
consolidated data from many perspectives� Done interactively, in real time, with rapid
response to queries
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Online Analytical Operations
� Consolidation� Aggregation of data
� Example: data about sales offices rolled up
to the district level
� Drill-Down
� Display underlying detail data
� Example: sales figures by individual product
� Slicing and Dicing
� Viewing database from different viewpoints
� Often performed along a time axis
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Geographic Information Systems
� GIS
� DSS uses geographic databases to construct
and display maps and other graphic displays
� Supports decisions affecting the geographicdistribution of people and other resources
� Often used with Global Positioning Systems
(GPS) devices
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Data Visualization Systems
� DVS
� Represents complex data using interactive,
three-dimensional graphical forms
(charts, graphs, maps)
� Helps users interactively sort, subdivide,
combine, and organize data while it is in its
graphical form
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Using Decision Support Systems
� Using a decision support system involvesan interactive analytical modeling process
� Decision makers are not demanding
pre-specified information� They are exploring possible alternatives
� What-If Analysis
� Observing how changes to selected variables
affect other variables
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Using Decision Support Systems
� Sensitivity Analysis� Observing how repeated changes to a single
variable affect other variables
� Goal-seeking Analysis� Making repeated changes to selected variables
until a chosen variable reaches a target value
� Optimization Analysis
� Finding an optimum value for selected variables,
given certain constraints
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Data Mining
� Provides decision support through knowledgediscovery� Analyzes vast stores of historical business data
� Looks for patterns, trends, and correlations
� Goal is to improve business performance
� Types of analysis� Regression
� Decision tree� Neural network
� Cluster detection
� Market basket analysis
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Analysis of Customer Demographics
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Market Basket Analysis
� One of the most common uses for data mining
� Determines what products customers purchase
together with other products
� Results affect how companies� Market products
� Place merchandise in the store
� Lay out catalogs and order forms� Determine what new products to offer
� Customize solicitation phone calls
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Executive Information Systems
� EIS
� Combines many features of MIS and DSS
� Provide top executives with immediate and
easy access to information� Identify factors that are critical to accomplishing
strategic objectives (critical success factors)
� So popular that it has been expanded to managers,
analysis, and other knowledge workers
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Features of an EIS
� Information presented in forms tailored to thepreferences of the executives using the system
� Customizable graphical user interfaces
� Exception reports� Trend analysis
� Drill down capability
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Dashboard Example
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Enterprise Information Portal Components
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Enterprise Knowledge Portal
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Case 2: Automated Decision Making
� Automated decision making has been slowto materialize
� Early applications were just solutions looking
for problems, contributing little to improved
organizational performance
� A new generation of AI applications
� Easier to create and manage
� Decision making triggered without humanintervention
� Can translate decisions into action quickly,
accurately, and efficiently
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Case 2: Automated Decision Making
� AI is best suited for � Decisions that must be made quickly and
frequently, using electronic data
� Highly structured decision criteria
� High-quality data
� Common users of AI
� Transportation industry
� Hotels
� Investment firms and lenders
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Case Study Questions
� Why did some previous attempts to use artificialintelligence technologies fail?
� What key differences of the new AI-based
applications versus the old cause the authors
to declare that automated decision making is
coming of age?
� What types of decisions are best suited for
automated decision making?
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Case Study Questions
� What role do humans plan in automateddecision-making applications?
� What are some of the challenges faced by
managers where automated decision-making
systems are being used?
� What solutions are needed to meet such
challenges?
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Artificial Intelligence (AI)
� AI is a field of science and technology based on� Computer science
� Biology
� Psychology
� Linguistics� Mathematics
� Engineering
� The goal is to develop computers than cansimulate the ability to think � And see, hear, walk, talk, and feel as well
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Attributes of Intelligent Behavior
� Some of the attributes of intelligent behavior � Think and reason
� Use reason to solve problems
� Learn or understand from experience� Acquire and apply knowledge
� Exhibit creativity and imagination
� Deal with complex or perplexing situations
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Attributes of Intelligent Behavior
� Attributes of intelligent behavior (continued)� Respond quickly and successfully to new
situations
� Recognize the relative importance of elements in a situation
� Handle ambiguous, incomplete, or
erroneous information
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Domains of Artificial Intelligence
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Cognitive Science
� Applications in the cognitive science of AI� Expert systems
� Knowledge-based systems
� Adaptive learning systems
� Fuzzy logic systems
� Neural networks
� Genetic algorithm software
� Intelligent agents
� Focuses on how the human brain works
and how humans think and learn
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Robotics
� AI, engineering, and physiology are the basicdisciplines of robotics� Produces robot machines with computer
intelligence and humanlike physical capabilities
� This area include applications designed to
give robots the powers of � Sight or visual perception
� Touch� Dexterity
� Locomotion
� Navigation
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Natural Interfaces
� Major thrusts in the area of AI and thedevelopment of natural interfaces� Natural languages
� Speech recognition
� Virtual reality
� Involves research and development in� Linguistics
� Psychology� Computer science
� Other disciplines
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Latest Commercial Applications of AI
� Decision Support� Helps capture the why as well as the what of
engineered design and decision making
� Information Retrieval� Distills tidal waves of information into simple
presentations
� Natural language technology
� Database mining
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Latest Commercial Applications of AI
� Virtual Reality� X-ray-like vision enabled by enhanced-reality
visualization helps surgeons
� Automated animation and haptic interfaces
allow users to interact with virtual objects
� Robotics
� Machine-vision inspections systems
� Cutting-edge robotics systems� From micro robots and hands and legs, to cognitive
and trainable modular vision systems
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Expert Systems
� An Expert System (ES)� A knowledge-based information system
� Contain knowledge about a specific, complex
application area� Acts as an expert consultant to end users
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Components of an Expert System
� Knowledge Base� Facts about a specific subject area
� Heuristics that express the reasoning procedures
of an expert (rules of thumb)
� Software Resources� An inference engine processes the knowledge
and recommends a course of action
� User interface programs communicate withthe end user
� Explanation programs explain the reasoning
process to the end user
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Components of an Expert System
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Methods of Knowledge Representation
� Case-Based� Knowledge organized in the form of cases
� Cases are examples of past performance,
occurrences, and experiences
� Frame-Based� Knowledge organized in a hierarchy or
network of frames
� A frame is a collection of knowledge aboutan entity, consisting of a complex package
of data values describing its attributes
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Methods of Knowledge Representation
� Object-Based� Knowledge represented as a network of objects
� An object is a data element that includes both
data and the methods or processes that act on
those data
� Rule-Based
� Knowledge represented in the form of rules
and statements of fact
� Rules are statements that typically take the
form of a premise and a conclusion (If, Then)
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Expert System Application Categories
� Decision Management� Loan portfolio analysis
� Employee performance evaluation
� Insurance underwriting
� Diagnostic/Troubleshooting
� Equipment calibration
� Help desk operations
� Medical diagnosis
� Software debugging
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Expert System Application Categories
� Design/Configuration� Computer option installation
� Manufacturability studies
� Communications networks
� Selection/Classification
� Material selection
� Delinquent account identification
� Information classification� Suspect identification
� Process Monitoring/Control
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Expert System Application Categories
� Process Monitoring/Control� Machine control (including robotics)
� Inventory control
� Production monitoring
� Chemical testing
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Benefits of Expert Systems
� Captures the expertise of an expert or group of experts in a computer-based information system
� Faster and more consistent than an expert
� Can contain knowledge of multiple experts� Does not get tired or distracted
� Cannot be overworked or stressed
� Helps preserve and reproduce the knowledge
of human experts
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Limitations of Expert Systems
� The major limitations of expert systems� Limited focus
� Inability to learn
� Maintenance problems� Development cost
� Can only solve specific types of problems
in a limited domain of knowledge
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Developing Expert Systems
� Suitability Criteria for Expert Systems� Structure: the solution process must be able
to cope with ill-structured, uncertain, missing,
and conflicting data and a changing problem
situation
� Availability: an expert exists who is articulate,
cooperative, and supported by the management
and end users involved in the developmentprocess
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Development Tool
� Expert System Shell� The easiest way to develop an expert system
� A software package consisting of an expert
system without its knowledge base� Has an inference engine and user interface
programs
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Knowledge Engineering
� A knowledge engineer � Works with experts to capture the knowledge
(facts and rules of thumb) they possess
� Builds the knowledge base, and if necessary,the rest of the expert system
� Performs a role similar to that of systems
analysts in conventional information systems
development
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Neural Networks
� Computing systems modeled after the brain¶smesh-like network of interconnected processing
elements (neurons)
� Interconnected processors operate in parallel
and interact with each other
� Allows the network to learn from the data it
processes
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Fuzzy Logic
� Fuzzy logic� Resembles human reasoning
� Allows for approximate values and
inferences and incomplete or ambiguous data
� Uses terms such as ³very high´ instead of
precise measures
� Used more often in Japan than in the U.S.
� Used in fuzzy process controllers used insubway trains, elevators, and cars
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Example of Fuzzy Logic Rules and Query
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Genetic Algorithms
� Genetic algorithm software� Uses Darwinian, randomizing, and other
mathematical functions
� Simulates an evolutionary process, yielding
increasingly better solutions to a problem
� Being uses to model a variety of scientific,
technical, and business processes
� Especially useful for situations in whichthousands of solutions are possible
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Virtual Reality (VR)
� Virtual reality is a computer-simulated reality� Fast-growing area of artificial intelligence
� Originated from efforts to build natural, realistic,
multi-sensory human-computer interfaces
� Relies on multi-sensory input/output devices
� Creates a three-dimensional world through
sight, sound, and touch
� Also called telepresence
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Typical VR Applications
� Current applications of virtual reality� Computer-aided design
� Medical diagnostics and treatment
� Scientific experimentation� Flight simulation
� Product demonstrations
� Employee training
� Entertainment
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Intelligent Agents
� A software surrogate for an end user or aprocess that fulfills a stated need or activity
� Uses built-in and learned knowledge base
to make decisions and accomplish tasks in
a way that fulfills the intentions of a user
� Also call software robots or bots
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User Interface Agents
� Interface Tutors ± observe user computer operations, correct user mistakes, provide
hints/advice on efficient software use
� Presentation Agents ± show information in a
variety of forms/media based on user preferences
� Network Navigation Agents ± discover paths
to information, provide ways to view it based
on user preferences
� Role-Playing ± play what-if games and other
roles to help users understand information and
make better decisions
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Information Management Agents
� Search Agents ± help users find files anddatabases, search for information, and suggest
and find new types of information products,
media, resources
� Information Brokers ± provide commercialservices to discover and develop information
resources that fit business or personal needs
� Information Filters ± Receive, find, filter,
discard, save, forward, and notify users about
products received or desired, including e-mail,
voice mail, and other information media
C 3 C li d B i I lli
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Case 3: Centralized Business Intelligence
� A reinventing-the-wheel approach to businessintelligence implementations can result in
� High development costs
� High support costs
� Incompatible business intelligence systems
� A more strategic approach
� Standardize on fewer business intelligence tools
� Make them available throughout the organization,
even before projects are planned
C 3 C t li d B i I t lli
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Case 3: Centralized Business Intelligence
� About 10 percent of the 2,000 largest companieshave a business intelligence competency center
� Centralized or virtual
� Part of the IT department or independent
� Cost reduction is often the driving force behind
creating competency centers and consolidating
business intelligence systems
� Despite the potential savings, funding for
creating and running a BI center can be an issue
C St d Q ti
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Case Study Questions
� What is business intelligence?� Why are business intelligence systems such
a popular business application of IT?
� What is the business value of the variousBI applications discussed in the case?
� Is the business intelligence system an MIS
or a DSS?
C 4 R b t th C D i t
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Case 4: Robots, the Common Denominator
� In early 2004, 22 patients underwent complexlaparoscopic operations
� The operations included colon cancer
procedures and hernia repairs
� The primary surgeon was 250 miles away
� A three-armed robot was used to perform the
procedures
� Left arm, right arm, camera arm
C 4 R b t th C D i t
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Case 4: Robots, the Common Denominator
� Automakers heavily use robotics� Ford has a completely wireless assembly factory
� It also have a completely automated body shop
� BMW has two wireless plants in Europe andis setting one up in the U.S.
� Vehicle tracking and material replenishment
are automated as well
C St d Q ti
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Case Study Questions
� What is the current and future business valueof robotics?
� Would you be comfortable with a robot
performing surgery on you?� The robotics being used by Ford Motor Co. are
contributing to a streamlining of its supply chain
� What other applications of robots can youenvision to improve supply chain management
beyond those described in the case?