Chap2-6
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Chap2-6

Course Number: I 503, Fall 2009

College/University: Drexel

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SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman C H A P T E R 2 Irwin/McGrawHill 2-1 INFORMATION SYSTEM BUILDING BLOCKS Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Chapter Two Information System Building Blocks Differentiate between front- and back-office information systems. Describe the different...

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ANALYSIS SYSTEMS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman C H A P T E R 2 Irwin/McGrawHill 2-1 INFORMATION SYSTEM BUILDING BLOCKS Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Chapter Two Information System Building Blocks Differentiate between front- and back-office information systems. Describe the different classes of information system applications (transaction processing, management information, decision support, expert, communication and collaboration, and office automation systems) and how they interoperate to supplement one another. Describe the role of information systems architecture in systems development. Identify three high-level goals that provide system owners and system users with a perspective of an information system. Name three goal-oriented perspectives for any information system. Identify three technologies that provide system designers and builders with a perspective of an information system. Describe four building blocks of the KNOWLEDGE goal for an information system. Describe four building blocks of the PROCESS goal for an information system. Describe four building blocks of the COMMUNICATIONS goal for an information system. Describe the role of network technologies as it relates to Knowledge, Processes, and Communications building blocks. 2-2 Copyright2004TheMcGrawHillCompanies.AllRightsreserved Irwin/McGrawHill SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Chapter Map Irwin/McGrawHill 2-3 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Front- and Back-Office Information Systems Front-office information systems support business functions that extend out to the organizations customers (or constituents). Marketing Sales Customer management Back-office information systems support internal business operations of an organization, aw well as reach out to suppliers (of materials, equipment, supplies, and services). Human resources Financial management Manufacturing Inventory control 2-4 Copyright2004TheMcGrawHillCompanies.AllRightsreserved Irwin/McGrawHill SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman A Federation of Information Systems Irwin/McGrawHill 2-5 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Information System Applications A transaction processing system (TPS) is an information system that captures and processes data about business transactions. A management information system (MIS) is an information system that provides for managementoriented reporting based on transaction processing and operations of the organization. A decision support system (DSS) is an information system that either helps to identify decision making opportunities or provides information to help make Irwin/McGrawHill 2-6 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Information System Applications An Executive Information System (EIS) is an information system designed for top-level managers that integrates data from all over the organization into at-a-glance graphical indicators and controls. An expert system is an information system that captures the expertise of workers and then simulates that expertise to the benefit of nonexperts. A communications and collaboration system is an information system that enables more effective communications between workers, partners, customers, and suppliers to enhance their ability to collaborate. An office automation system is an information system that supports the wide range of business office activities that provide for improved work flow between workers. Irwin/McGrawHill 2-7 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Information System Applications Irwin/McGrawHill 2-8 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Information Systems Architecture Information systems architecture - a unifying framework into which various stakeholders with different perspectives can organize and view the fundamental building blocks of information systems. Irwin/McGrawHill 2-9 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Focuses for Information Systems Knowledgetherawmaterialusedtocreateuseful information. Processtheactivities(includingmanagement)that carryoutthemissionofthebusiness. Communicationhowthesysteminterfaceswithits usersandotherinformationsystems. Irwin/McGrawHill 2-10 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Information System Building Blocks Irwin/McGrawHill 2-11 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman KNOWLEDGE Building Blocks Irwin/McGrawHill 2-12 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley of Dittman Views KNOWLEDGE System owners view Interested not in raw data but in information that adds new business knowledge and information that help managers make intelligent decisions. Business entities and business rules. System users view View data as something recorded on forms, stored in file cabinets, recorded in books and binders, organized into spreadsheets, or stored in computer files and databases. Tend to focus on the business issues as they pertain to the data. Data requirement a representation of users data in terms of entities, attributes, relationships, and rules independent of data technology. System designers view Data structures, database schemas, fields, indexes, and constraints of particular database management system (DBMS). System builders view SQL DBMS or other data technologies Irwin/McGrawHill 2-13 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman PROCESS Building Blocks Irwin/McGrawHill 2-14 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Views of PROCESS System owners view Concerned with high-level processes called business functions. Business function a group of related processes that support the business. Functions can be decomposed into other subfunctions and eventually into processes that do specific tasks. A cross-functional information system a system that supports relevant business processes from several business functions without regard to traditional organizational boundaries such as divisions, departments, centers, and offices. Continued ... Irwin/McGrawHill 2-15 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Views of PROCESS (continued) System users view Concerned with work that must be performed to provide the appropriate responses to business events. Business processes activities that respond to business events. Process requirements a users expectation of the processing requirements for a business process and its information systems. Policy a set of rules that govern a business process. Procedure a step-by-step set of instructions and logic for accomplishing a business process. Work flow the flow of transactions through business processes to ensure appropriate checks and approvals are implemented. Continued ... Irwin/McGrawHill 2-16 Copyright2004TheMcGrawHillCompanies.AllRightsreserved SYSTEMS ANALYSIS AND DESIGN METHODS 6th Edition Whitten Bentley Dittman Views of PROCESS (continued) System designers view Concerned with which processes to automate and how to automate them Constrained by limitations of application development technologies being used Software specifications the technical design of business processes to be automated or supported by computer programs to be written by system builders. System builders view Concerned with programming logic that implements automated processes Application program a language-based, machine-readable representation of what a software process is supposed to do, or how a software process is suppo...

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