Introduction to Management Information Systems Chapter 1 & 3 Summary and Review

1. Introduction to Management Information SystemsChapter 1 & 3 Summary and Review HTM 304 Fall 07

2. 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: • Microsoft’s stock costs $43.5 per share (data) • The average wait time for a customer at a call center (information) • Information is relative. One person’s information may become another person’s 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

3. 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

4. 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?

5. 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?

6. 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

7. 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)

8. 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

9. Important Storage-Capacity Terminology

10. 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.

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

12. Exercise • Handout Set 5

13. 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

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