F09_class_34_Ch10_35_ChExt19

F09_class_34_Ch10_35_ChExt19 - Information Systems...

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Information Systems Development Techniques and Challenges Chapter 10 Chapter Ext. 19 MIS 301 Introduction to IT Management
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Agenda XL Miner homework due in hard copy on Mon, 11/16, at the beginning of class IT Interview assignment questions Using technology to improve a business process http:// www.youtube.com/watch?v =oe3pHNaMwUw Chapter 10 “Information Systems Development” Chapter Extension 19 “Systems Development Project Management” MIS survey by show of hands: Taking MIS 304 Taking MIS 325
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Development involves all 5 IS components Requires more than technical expertise • Establish systems goals • Setting up the project • Determining project requirements Requires business knowledge and management skill Information systems are never just off-the-shelf; they involve your company’s people and procedures What is Systems Development?
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IS Development Challenges for Majestic River Ventures Business problems Lack central database Lack service-oriented architecture Want to bring customers closer by creating an architecture of participation Think they might need 2 websites – do they? Old, outdated equipment Web person is basically a graphic designer How can they understand what they need and find resources to create it?
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Major System Development Challenges
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Why is IS Development Difficult? 1. Difficulty of determining requirements 2. Requirements change as system develops 3. Schedule and budget difficult to estimate They change as project scope changes 4. Technology changes – how do you adapt? Change when technology changes? Keep re-starting? How many times will you need to rebuild the data model? 5. Diseconomies of scale As development teams grow, average contribution per worker decreases Brook’s Law – adding more people makes the project later
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SDLC Process Iterative Classical 5-phase IS development process 1. Systems definition Management’s statement defines new system 1. Requirements analysis Identify features and functions 1. Component design Based on approved user requirements 1. Implementation Implement, test, and install new system 1. System maintenance Repair, add new features, maintain
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5 Phases in SDLC Figure 10-2 Iterative Process
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1 . SDLC Systems Definition Define system goals – system must Facilitate organization’s competitive strategy Support business processes Improve decision making Determine project’s scope May be delineated by users, processes, or facilities Assess feasibility of project (Proof of Concept) Cost: How much have similar projects cost?
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F09_class_34_Ch10_35_ChExt19 - Information Systems...

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