Chap 10 - Systems Analysis and Design 8th Edition Chapter...

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Unformatted text preview: Systems Analysis and Design 8th Edition Chapter 10 System Architecture Chapter Objectives • Provide a checklist of issues to consider when selecting a system architecture • Describe servers, server-based processing, clients, and client-based processing • Explain client/server architecture, including tiers, cost-benefit issues, and performance • Compare in-house e-commerce development with packaged solutions 2 Chapter Objectives • Discuss the potential impact of cloud computing and Web 2.0 • Explain the difference between online and batch processing • Define network topology, including hierarchical, bus, ring, and star models 3 Chapter Objectives • Explain network protocols and licensing issues • Describe wireless networking, including wireless standards, topologies, and trends • Describe the system design specification 4 Introduction • An effective system combines elements into an architecture, or design, that is flexible, cost-effective, technically sound, and able to support the information needs of the business • System architecture translates the logical design of an information system into a physical structure that includes hardware, software, network support, and processing methods 5 System Architecture Checklist • Enterprise Resource Planning (ERP) – The objective of ERP is to establish a company-wide strategy for using IT resources – Supply chain management (SCM) • Initial Cost and TCO – During the final design stage, you make decisions that will have a major impact on the initial costs and TCO for the new system – You should review all previous cost estimates 6 System Architecture Checklist • Scalability – Scalability, also called extensibility, refers to a system’s ability to expand, change or downsize easily to meet the changing need of a business enterprise – Especially important in implementing systems that are volume-rated, such as transaction processing systems 7 System Architecture Checklist • Web Integration – An information system includes applications – Web-centric architecture – Avoids many of the connectivity and compatibility problems that typically arise 8 System Architecture Checklist • Legacy System Interface Requirements – The new system might have to interface with one or more legacy systems – Interfacing a new system with a legacy system involves analysis of data formats and compatibility – The analyst must know if the new application eventually will replace the legacy system 9 System Architecture Checklist • Processing Options – In planning the architecture, designers also must consider how the system will process data - online or in batches – Provision must be made for backup and speedy recovery in the event of system failure 10 System Architecture Checklist...
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This note was uploaded on 01/30/2012 for the course CNIT 180 taught by Professor Victorbarlow during the Spring '12 term at Purdue.

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Chap 10 - Systems Analysis and Design 8th Edition Chapter...

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