Introduction to Management Information Systems Chapter 1

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Introduction to Management Information
SystemsChapter 1 3 Summary and Review

• HTM 304
• Fall 07

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Chapter 1 MIS Basic Concepts

• Basic concepts
• Management Information Systems -- The
  development and use of information systems to
  achieve business goals and objectives
• Information Systems -- A group of components
  that produces information
• Information -- 4 different definitions, use to
  determine information or data
• Microsofts stock costs 43.5 per share (data)
• The average wait time for a customer at a call
  center (information)
• Information is relative. One persons information
  may become another persons data.
• Information System Research How to design the
  system, which can
• take the raw data and process them into the
  information (all business majors)
• provide the decision maker good information so as
  to make the
• right decision ? achieve business goals and
  objectives

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Chapter 1 Continue

• Good Information
• Good information helps decision maker make the
  right decision
• General Guidelines SMART
• Example
• The average temperature on the surface of the
  moon would probably not be good information for a
  financial analyst, because it may violate which
  of the following characteristics of good
  information?
• a. just sufficient.
• b. timely.
• c. relevant.
• d. accurate.
• e. worth its money

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Chapter 1 Components of Information Systems

• Five components
• Memorize the five components
• Give examples of the five components
• E.g. songs downloaded from itune store is an
  example of the ________ component.
• From the five components point of view, what is
  the network / Internet?
• Which is the most important one among those five?

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Chapter 3 Computer Basics

• Basic Logical Operation And, Or, Not
• Binary System
• How to count?
• How to convert?
• Question
• What does bit stand for?
• Given a binary number, how to judge whether the
  number is odd or even?

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Binary Numeral System

• Computers represent data using binary digits,
  called bits.
• Bits are used for computer data because they are
  easy to represent physically.
• Direction of Magnetism, etc.
• Some old time machines
• (watch the video clip and answer questions)
• Computers use bits for two purpose
• Instruction
• For example
• a sequence 0111100010001110 means adding two
  numbers together.
• Data

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Computer Data

• Bits are grouped into 8-bit chunks called bytes.
• What is the largest value for a byte?
• Example 1 Color.
• Many software applications use 3 Bytes (24bits)
  to represent color. RGB Value
• Windows System 32 bits.
• Example 2 IP address.
• Example 3 Characters (ASCII Table)

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Exercise

• Computer A is broadcasting its IP address
  192.3.28.29 to the network. How the electric
  signals are sent via the network? Draw the square
  wave.
• Binary Sequence
• 11000000 00000000 0001110 00011101

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Important Storage-Capacity Terminology
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Ambiguity of Binary Data

• A binary sequence 0100 0001 can be used to
  represent both decimal value 65 and the character
  A
• How to convert between upper case letters and
  lower case letters?
• Case sensitive?
• This ambiguity is more than curiosity virus
  authors and other cyber-criminal use it to their
  advantage.

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A simple example of encryption
E.g. Reverse the logic on the 1st and 3rd bits
from the right
Exercise
Handout Set 5
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Exercise

• Handout Set 5

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Summary

• Learning Binary to understand more about computer
• Logic Operations AND, OR, NOT
• Count Binaries
• Conversion binary ? decimal, decimal ? binary
• Binary addition (not required)
• Use bytes to represent information
• 1 byte ? bits
• Check ASCII table for information

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Field Study Assignment

• Read the handout and Chapter 3
• Find your group member
• Prepare a presentation to address the questions
  in the handout.