Thông tin tài liệu
James A O’Brien Introduction to Information Systems Chapter 10 Developing E-Business Solutions Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Chapter Objectives • Use the IS development process and the model of information systems components from Chapter and this chapter as problem-solving frameworks to help you propose information systems solutions to simple business problems • Describe and give examples to illustrate how you might use each of the steps of the information system development cycle to develop and implement an E-Business system Irwin/McGraw-Hill James A O’Brien Introduction to Information Systems Chapter Objectives • Explain how prototyping improves the process of systems development for end users and IS specialists • • Identify the activities involved in the implementation of new information systems Describe several evaluation factors that should be considered in evaluating the acquisition of hardware, software, and IS services • Identify some of the challenges involved in the implementation process for managing technological change Irwin/McGraw-Hill Introduction to Information Systems James A O’Brien Systems Approach to Problem Solving Define Define the the Problem Problem Develop Develop Monitor and Evaluate Results Alternative Alternative Solutions Solutions Select Select the the Solution Solution Design Design the the Solution Solution Implement Implement the the Solution Solution Irwin/McGraw-Hill Introduction to Information Systems James A O’Brien Traditional Systems Development Life Cycle Understand the Business Problem or Systems Systems Investigation Investigation Product: Product: Feasibility Feasibility Study Study Opportunity Develop an Systems Systems Analysis Analysis Information Product: Product: System Functional Functional Requirements Requirements Solution Systems Systems Design Design Product: Product: System System Specifications Specifications Implement the Information System Systems Systems Implementation Implementation Product: Product: Operational Operational System System Solution Systems Systems Maintenance Maintenance Product: Product: Improved Improved System System Irwin/McGraw-Hill Introduction to Information Systems James A O’Brien Prototyping Process Identify Identify an an End End User's User's Information Information Requirements Requirements Develop Develop Information Information System System Prototypes Prototypes Prototyping Cycle Revise Revise the the Prototypes Prototypes to to Better Better Meet Meet End End User User Requirements Requirements Maintenance Cycle Use Use and and Maintain Maintain the the Accepted Accepted System System Irwin/McGraw-Hill Introduction to Information Systems James A O’Brien End User Development Controls Controls What Whatcontrols controls are areneeded? needed? Input Input What Whatdata data isisrequired? required? Processing Processing What Whatoperations operations on onthe theinput input isisrequired? required? Storage Storage Will Willthe the application applicationneed need totostore storedata? data? Irwin/McGraw-Hill Output Output What Whatinformation information isisneeded? needed? James A O’Brien Introduction to Information Systems Systems Investigation Economic Organizational Feasibility Feasibility Can we afford it? Is it a good fit? Technical Operational Feasibility Feasibility Does the Will it be accepted? capability exist? Irwin/McGraw-Hill Introduction to Information Systems James A O’Brien Systems Analysis Organizational Organizational Key Areas of Systems Analysis Irwin/McGraw-Hill Present Present Functional Functional System System Requirements Requirements James A O’Brien 10 Introduction to Information Systems Systems Design User User Interface Interface Design Design Data Data Process Process Design Design Design Design Screen, Form, Report Data Element and Dialog Design Structure Design Irwin/McGraw-Hill Program and Procedure Design James A O’Brien 11 Introduction to Information Systems Computer-Aided Systems Engineering Planning Toolset Server Repository Analysis Toolset CASE Design Toolset Information Integrator Workstation Repositories Irwin/McGraw-Hill Code Database Generation Generation Toolset Toolset System Interface James A O’Brien 12 Introduction to Information Systems The Implementation Process Implementation Implementation Activities Activities Development Development Acquisition Acquisition and and Modification Modification System System End End User User Testing Testing Training Training System System DocuDocumentation mentation Irwin/McGraw-Hill Conversion Conversion James A O’Brien 13 Introduction to Information Systems Evaluating Hardware and Software Hardware Evaluation • • • • • • • • • Performance Cost Reliability Compatibility Technology Connectivity Scalability Support Software Irwin/McGraw-Hill Factors Software Evaluation • • • • • • • • Quality Flexibility Security Connectivity Language Documentation Hardware Efficiency Factors Introduction to Information Systems James A O’Brien 14 Installation Conversion Methods Old Old System System Parallel New New System System Old Old System System Old Old System System Old Old System System Irwin/McGraw-Hill New System New System New New System System Pilot Phased Plunge Introduction to Information Systems James A O’Brien 15 Managing Organizational Change Educate and Train Change Organizational Management Design Measurement Core and Competencies Rewards Development User Involvement Irwin/McGraw-Hill James A O’Brien 16 Introduction to Information Systems Chapter Summary • Business professionals and IS specialists use a systems approach to help them develop information system solutions to meet E-Business needs • Prototyping is a major alternative methodology to the traditional information system development cycle It includes the use of prototyping tools and methodologies, which promote an iterative, interactive process Irwin/McGraw-Hill James A O’Brien 17 Introduction to Information Systems Chapter Summary (cont) • The application development capabilities built into many end user software packages have made it easier for end users to develop their own E-Business applications • The implementation process for IS projects involves acquisition, testing, documentation, training, installation, and conversion • Business professionals should know how to evaluate IT products for acquisition IT vendor proposals should be based on specifications developed during the design phase Irwin/McGraw-Hill James A O’Brien 18 Introduction to Information Systems Chapter Summary (cont) • Implementation activities include managing the introduction and implementation of changes in the business processes, organizational structures, job assignments, and work relationships resulting from EBusiness initiatives Irwin/McGraw-Hill ... 11 Introduction to Information Systems Computer-Aided Systems Engineering Planning Toolset Server Repository Analysis Toolset CASE Design Toolset Information Integrator Workstation Repositories... Requirements Develop Develop Information Information System System Prototypes Prototypes Prototyping Cycle Revise Revise the the Prototypes Prototypes to to Better Better Meet Meet End End User... Processing Processing What Whatoperations operations on onthe theinput input isisrequired? required? Storage Storage Will Willthe the application applicationneed need totostore storedata? data? Irwin/McGraw-Hill
Ngày đăng: 11/12/2018, 15:14
Xem thêm:
