Bachelor of Information Technology Information Systems Technology IT
Bachelor of Information Technology Information Systems & Technology IT 1105 01. Introduction to Information Systems - Part I Prabhajinie Jayabaalasundaram MBCS, MBA in HRM
IT 1105 Information Systems and Technology Intended Learning Outcomes After completing this Course you should be able to • Describe the components of a computer based information systems. • Explain different types of information systems and their use. • Describe the IS development process. • Describe management challenges / issues associate with the use of computer based information systems as well as methods that can be used to prevent these challenges/issues.
IT 1105 Information Systems and Technology Objective of today’s session • Distinguish data from information • Describe the characteristics used to evaluate the quality of information • Identify system concepts • Describe the components of an information system
IT 1105 Information Systems and Technology Outline • Information Concepts • Information System
IT 1105 Information Systems and Technology Data Vs Information Data - consists of raw facts. Types of Data : Data Alphanumeric Data Represented by Numbers, letters and other characters Image Data Graphic images and pictures Audio Data Sound, noise and tones Video Data Moving images and pictures
IT 1105 Information Systems and Technology Information- is a collection of facts organized and processed so that they have additional value beyond the value of the individual facts. The process of transforming Data into Information Data Transformatio n process Information
IT 1105 Information Systems and Technology Characteristics of Valuable Information 1) Accessible - Information should be easily accessible by authorized users. 2) Accurate - Accurate information is error free. 3) Complete - Complete information contains all the important facts. 4) Economical - Information should be relatively economical to produce. 5) Flexible - Flexible information can be used for a variety of purposes.
IT 1105 Information Systems and Technology Characteristics of Valuable Information 6) Relevant – Relevant information is important to the decision maker. 7) Reliable - Reliable information can be trusted by users. 8) Secure - Information should be secure from access by unauthorized users 9) Simple - Information should be simple, not overly complex. 10) Timely - Timely information is delivered when it is needed. 11) Verifiable - Information should be verifiable.
IT 1105 Information Systems and Technology The value of Information • is directly linked to how it helps decision makers achieve their Organization's goals • can help people in their organizations perform tasks more efficiently and effectively • can also help managers decide whether to invest in additional information systems and technology • can be realized in cost savings
IT 1105 Information Systems and Technology Systems concepts and components A System is a set of elements or components that interact to accomplish goals. The elements themselves and the relationships among them determine how the system works. Systems have inputs, processing mechanism, outputs and feedbacks
IT 1105 Information Systems and Technology System performance and standards System performance can be measured in various ways. a) Efficiency – is a measure of what is produced divided by what is consumes. b) Effectiveness – is a measure of the extent to which a system achieves its goals c) System standard performance - is a specific objective of the system.
IT 1105 Information Systems and Technology Question Which of the following can be considered only as an input device? a) Scanner c) Light Pen b) Digital Camera d) Touch Screen E) Monitor Valuable information should be (a) complex. (b) accurate. (c) expensive. (d) relevant. (e) verifiable.
IT 1105 Information Systems and Technology Question Which of the following can be considered only as an input device? a) Scanner c) Light Pen b) Digital Camera d) Touch Screen E) Monitor Valuable information should be (a) complex. (b) accurate. (c) expensive. (d) relevant. (e) verifiable.
IT 1105 Information Systems and Technology Information Systems An Information System (IS) is a set of interrelated components/ elements that collects (input), manipulate (process), store and disseminate(output) data and information and provide a corrective reaction (feedback mechanism) to meet an objective. Feedback Input Processing Output
IT 1105 Information Systems and Technology Main components of an Information system Input - Input is the activity of gathering and capturing raw data. Processing - Process means converting or transforming data into useful output. Output - In information systems output involves producing useful information mainly in the form of documents and reports. Feedback - Feedback in information systems is information from the system that is used to make changes to output or processing activities.
IT 1105 Information Systems and Technology Computer based Information systems (CBIS) is a single set of hardware, software, database, telecommunications, people and procedures that are configured to collect, manipulate, store and process data into information. Hardware - Hardware consists of the physical components of a computer that perform the input, processing, storage and output activities of the computer.
IT 1105 Information Systems and Technology Computer based Information systems Software - Software consists of the computer programs that govern the operation of the computer. There are 2 types of Software System software – control basic computer operations including start up and printing. In other words, they are the operating systems. Application software – this allow us to accomplish specific tasks like word processing or tabulating numbers.
IT 1105 Information Systems and Technology Computer based Information systems Database - The database is an organized collection of facts and information, typically consisting of two or more related data files. Telecommunications, Networks and the internet Telecommunications - Telecommunications is the electronic transmission of signals for communications, which enables organizations to carry out their processes and tasks through effective computer networks.
IT 1105 Information Systems and Technology Computer based Information systems Network - Network connects computers and equipment to enable electronic communications. The internet is the world’s largest network, consisting of thousands of interconnected networks, all freely exchange information. The World Wide Web (WWW) or the web is a network of links on the internet to documents containing text, graphics, video and sound. Information about the documents and access to them are controlled and provided by tens of thousands of special computers called web servers.
IT 1105 Information Systems and Technology Computer based Information systems Intranet – an internet network based on web technologies that allow people in an organization to exchange information and work on projects. Extranet - a network based on web technologies that allow selected outsiders such as business partners and customers to access authorized resources of a company’s intranet.
IT 1105 Information Systems and Technology Computer based Information systems People - Information system personnel include all the people who manage, run, program and maintain the system. Users are the people who work with the Information systems to get results. Procedures - Procedures include the strategies, policies, methods and rules for using the CBIS, including the operation, maintenance, and security of the computer. Good procedures can help companies take advantage of new opportunities and avoid potential disasters. Poorly developed and inadequately implemented procedures can cause people to waste their time on useless rules or results in inadequate responses to disaster.
IT 1105 Information Systems and Technology Question Which of the following statements is/are correct about input and output devices? (a) Point-Of-Sale (POS) terminals can include bar-code scanners which read and enter codes into computer systems. (b) Automated Teller Machines (ATMs) are terminals with keyboards used for transactions. (c) Joysticks allow users to activate a command, enter handwritten notes and draw objects and figures. (d) The quality of a display monitor is determined by the size, colour and resolution. (e) Printers and scanners are popular output devices.
IT 1105 Information Systems and Technology Question Which of the following statements is/are correct about input and output devices? (a) Point-Of-Sale (POS) terminals can include bar-code scanners which read and enter codes into computer systems. (b) Automated Teller Machines (ATMs) are terminals with keyboards used for transactions. (c) Joysticks allow users to activate a command, enter handwritten notes and draw objects and figures. (d) The quality of a display monitor is determined by the size, colour and resolution. (e) Printers and scanners are popular output devices.
IT 1105 Information Systems and Technology Summary Information concepts Data, Information, Information Systems Main components
Bachelor of Information Technology Information Systems & Technology IT 1105 01. Introduction to Information Systems - Part I Prabhajinie Jayabaalasundaram MBCS, MBA in HRM
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