Copy of MIS 371 Lpaper3 cd selections

Copy of MIS 371 Lpaper3 cd selections - 1 System Analysis...

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System Analysis & Design, Phase III SDLC 3 CD Case Selections: A Review of CD Selections Decisions of Phase III SDLC MIS 371, M 2:00-4:30 Dr. Robert Mullen November 6, 2006 1
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System Analysis & Design, Phase III SDLC 3 Objective of Phase III: The System Development Process Phase III of the SDLC is the Design Phase . The design phase will decide how the system operates. We will collect and define the system specifications from the deliverables. To be successful in the design phase we will build on what we learned in the analysis phase. Both the functional, and non-functional requirements will establish the new system requirements. The system design is the determination of the whole system architecture. This includes the physical processes, hardware, software, users, and how they communicate. Finally we will compile the deliverables and present to the approval committee. CD Selections: What They Did Right Selecting an Acquisition Strategy Deciding to increase technical skills in-house, Alec decided against using an outside service provider. Concerning the shopping cart program he also decided not to waste the in-house technical abilities to create a program. Shopping cart programs are very common to Internet business, have proven reliability, be integrated into existing systems easily, and acquired cheaply. Alec chose to create an alternative weighted matrix to compare several existing software programs, and ultimately chose one based on the results. Architecture Design The project team chose to use three-tiered client-server architecture. This design fits with their economic feasibility of keeping costs down. It satisfies their technical feasibility with 2
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System Analysis & Design, Phase III SDLC 3 regard to being able to upgrade as needed. Its also provides a balance of application use with the ability to spread the applications to each server according to needs. This configuration allows the design team to incorporate custom application features and software packages to be able to talk to each other in different languages with the use of middleware, if needed in the future. Working with the purchasing department they decided to buy a database server, a web server, and five client computers for the marketing department. The database server will have its own separate program to exchange data with the special order system, inventory. These will integrate with their current mainframe, which holds their entire information database. The team expanded the operational requirements and the performance requirements. The operation requirements were clearly defined, except for maintainability. The performance requirements with regards to speed, capacity, availability and reliability appear to be on par with the average business standards. User Interface Design
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This essay was uploaded on 04/18/2008 for the course MIS 470 taught by Professor Mullen during the Spring '07 term at S. Connecticut.

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Copy of MIS 371 Lpaper3 cd selections - 1 System Analysis...

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