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Management of Information Security

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44 Chapter 3 Information Systems Development and Management 3.1 Overview of System Development 3.1.1 System Development A system is a set of components that interact to achieve a common goal. You use, observe, and interact with many systems during daily activities. You drive a highway system to reach a destination. You use a programmable thermostat to regulate your heating and cooling systems to save energy. Businesses also use many types of systems. A billing system allows a company to send invoices and receive payments from customers. An inventory system keeps track of the items in a warehouse. A manufac- turing system produces the goods that customers order. Through a payroll system, employees receive paychecks. Very often, theses systems also are information systems. An information system is a collection of hardware, software, data, people, communications, and procedures that work to- gether to produce quality information. The goal of an information system is to provide users with high-quality information so they can make effective decisions. An information system supports daily, short-term, and long-range activities of users. Some Overview of System Development System Development Information System Planning Establishing Objectives and information requirements for Systems Development Measuring Information System Performance Project Management Participants in Information Systems Development System Development Life Cycle Phases in System Development Cycle Planning Phase Analysis Phase Design Phase Implementation Phase Operation and Maintenance Phase CSAE Tools Alternative System Development Approaches Prototyping Application Software Package End-User Development Developing Systems with Teams: JAD and RAD Outsourcing Summary Information System Management Understanding Ethical and Social Issues Related to Systems Information Security Establishing a Framework for System Security and Control Contents After completing this chapter, you will be able to Understand howl organizations develop their information systems. Identify the key participants in the system development process and understand their roles. Explain the phases in the system development life cycle. Identify the core activities in the information systems development process. Understand other system-building alternatives. Understand ethical and social issues related to information systems Understand information security and control Objectives
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45 examples of users include store clerks, sales representatives, accountants, supervisors, managers, executives, and customers. The kinds and types of information that users need often change over time. As a system user in a business, you someday may participate in the modification of an existing system or the development of a new system. Thus, it is important that you understand the system development in business. Systems development is the activity of creating a new business system or modifying an existing business system. It refers to all aspects of the process --
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