UB MGS 351 - MGS3513 test 3 study guide (21 pages)

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MGS3513 test 3 study guide



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MGS3513 test 3 study guide

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Pages:
21
School:
University at Buffalo, The State University of New York
Course:
Mgs 351 - Intro to Mgmt Info Systms
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MGS351 Test 3 Chapter 6 Systems Development Organizational Change 4 degrees understand relationships with risk and return 1 Automation speeding up performance simplest form have existing system and then automate keep the same 2 Rationalization of procedures streamlining op operating procedure use technology to influence change for profit takes existing procedure and make it better 3 Business process reengineering BPR radical design of business process build whole new process think outside the box much greater degree of change use technology a Ex ordering process for bookstore keep physical store but also make online 4 Paradigm shift radical re conceptualization greatest change a Ex local bookstore with technology can shut down physical store and only sell books online Why Systems Fail 20 of systems succeed 80 fail Unclear or missing requirements Skipping SLDC phases take short cuts in designing Failure to manage project scope the details scope creep and feature creep o 3 goals on time on budget and on target having required functions of requirements Failure to manage project plan larger budget issues Changing technology Inadequate testing and or poor implementation o Ex End users aren t trained properly Not planning for the future When building an information system you are influencing organizational change and need to understand risk ex HUB shifted from old to new Information Systems Planning needs to support organization mission Organization Mission everyone needs to be aligned Business Assessment IS planning process Organization Strategic Plan ex UB 2020 Current information technology architecture o What technology you have in the organization Ex the network systems IS strategic plan works with organization strategic plan ex voice of IP upgrade for UB 2020 New information Technology Architecture need architecture in place to support strategic plan ex UB voice over IP system but network was not up to par so upgraded equipment on campus IS Operational Plan IS development Projects voice over IP o Specific projects that get funded they support the mission Look at chart in slides Systems Development Life Cycle SDLC traditional approach SDLC the development method used by most organizations today for large complex systems Waterfall approach a sequence of steps in the SDLC with cycles returned to previous stops Systems Analysts IS professionals who specialize in analyzing and designing information systems from business perspective no technology Programmers IS professionals who modify existing computer programs or write new computer programs to satisfy user requirements build systems Technical Specialists experts in a certain type of technology such as databases telecommunications or networkers SDLC 7 STEPS 1 Plan Define the system to be developed set the project scope develop the project plan including tasks resources and timeframes a Project Scope Document a written definition of the project scope and is usually no longer than a paragraph outlines what is and what isn t brief description b Project Plan defines the what when and the who questions of system development including all activities to be performed the individuals or resources who perform the activities and the time required to complete each activity outlines details c Project Milestones represents key data for which you need a certain group of activities performed in SDLC d Project Manager an individual who is an expert in project planning and management defines and develops the project plan and tracks the plan to ensure all key project milestones are completed on time understand how to stay on budget on time on target e Feasibility study determines the probability of success of proposed systems development project does this make sense to do and assesses the projects i Technical Feasibility do we have technical infrastructure or expertise to be able to execute on this Ex wireless system but no wireless capability ii Economic Feasibility Are we going to make Will cost this outweigh the benefits Intangibles how do you measure customer satisfaction iii Behavioral Feasibility ex paper system changes to computerized system to track deliveries and generate invoices there are so many benefits that had to be given up company 2 3 4 5 was very nervous about having to give up papers ex possibility of resistance people don t like change and like consistency Analysis looking at requirements of a system through business perspective What are the problems What does system need to do a Involves the examination of the business problem the organization plans to solve with information systems b Requires end users and IT specialists to work together to gather understand and document the business requirements or the proposed system c Joint application development JAD is often used to accomplish this get everyone together and facilitate process come to consensus d Requirements definition document documentation of JAD prioritizes the business requirements and places them in a formal comprehensive document requires a sign off approval by the knowledge workers i Here is what we need the system to do e Also may include i Strengths and weaknesses of the existing system ii Functions that the new systems must have to solve the business problem iii User information requirements for the new systems Design a Develop a technical blueprint of how the proposed system will work and define the technical architecture ex ERD b Technical design system outputs inputs and user interfaces hardware software databases telecommunications personnel and procedures how these computers are integrated Development take implications and build Can take years to build a The translation of the design specifications into the computer code which becomes the actual system b Also build the technical architecture databases and programs Test need to figure out how much testing is enough a Checks to see if the computer code will produce the expected and desired results under certain conditions b Syntax Errors misspelled word or a misplaced comma good errors because know when are happening something will pop up and can fix them c Logic errors permit the program to run but result in incorrect output dangerous exist in calculation of code just produce bad outputs i Ex 1st gulf war Iraq had missiles and US had missile defense system the software was tested but only for a day at a time and eventually error became worse rounding error d Unit testing test modules or units ex delivery system


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