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Traditional Systems Development Life Cycle Systems Investigation, Analysis, Design, Implementation, Maintenance and Review
Systems Development An activity of creating new systems or modifying existing business systems with the goal of improving both internal and external processes.
Stakeholders individuals who either themselves or through the organization they represent, ultimately benefit from the systems development project
Users individuals who will interact with the system regularly
Systems Analyst a professional who specializes in analyzing and designing business systems. Often the only person who sees the system in its totality.
Programmer the specialist responsible for modifying or developing programs to satisfy user requirements.
Systems Investigation-Operational Feasibility Analysis Whether the project can be put into action/operation
Systems investigation 3 steps - initiate systems investigation; conduct feasibility analysis; produce systems investigation report
Systems Investigation - initiating: Systems request form formal document to initiate systems investigation that includes probles/opportunities for the system; objectives; overview of proposed systems; and expected costs & benefits
Systems Investigation - Tech Feasibility Analysis Whether the hardware, software and other system components can be acquired or developed to solve the problem
Systems Investigation-Economic Feasibililty Analysis Whether it makes financial sense; do the benefits offset the cost and time needed
Systems Investigation-Legal Feasibility Analysis Whether the laws/regulations allow the system development project
Systems Investigation-Schedule Feasibility Analysis Whether the project can be completed in a reasonable amount of time
Systems Investigation- 5 Feasibility Analyses Technical, Economic, Legal, Operational, Schedule
Four steps of Systems Analysis Data Collection, Data Analysis,Requirements Analysis, Systems Report
Systems Analysis - Data Collection Seeks addtional info about problems, identifies strengths and weaknesses, techniques such as interviews, surveys, direct observation; and involves both internal & external sources
Systems Analysis - Data Collection Manipulates collected data to be usable and uses data modeling and activity modeling with entity-relationship diagrams and data flow diagrams
Systems Analysis - Requirements Analysis Identifies user, stakeholder and organizational needs for the new or modified system; and studies problems they are having with the current system and improvements they suggest
Systems Analysis - the report Should coverstrengths & weaknesses of the existing system from a stakeholder's perspective; the user/stakeholder requirements for the new system; the organizational requirements for the new system; and a description of new system to solve problem
Systems design - two dimensions Logical and Physical
Systems design - Logical design - description of the functional requirements of the system;
Systems design - Physical design - specification of the characteristics of the system components necessary to put the logical design into action
Systems design - 3 steps Generate systems design alternatives, evaluate and select a system design; and develop the design report
Systems design- Generating system design alternatives Use in-house resources and Initiate a RFP (Request for ProposalO
Systems Design - RFP One of most important docs in systems development; results in a formal bid to determine who gets a contract; and specifies detail required resources
Systems Design - evaluating & selecting a system design evaluate alternative and select best solution, preliminary evaluation followed by final evaluation; and compare cost, performance, service, flexibility, etc
Systems Design - Develop Systems design report detail systems inputs, outputs & user interfaces; specifies hardware, software, databases, telecommunications, personnel & procedures; and shows how these components are related
Systems Implementation creation of system components and place system in operation; important task is to train users; and results in operational informational system that meets the business needs
Steps of Systems implementation hardware acquisition, software acquisition, user preparation, personnel - hiring and training, site preparation, data preparation, installation, testing, start up, and user acceptance
Systems Implementation - Start up What is direct conversion stopping the old system and starting the new system on a given date.
Systems Implementation - Start up what is phase in slowly replacing components of the old system wiht those of the new system
Systems Implementation - Start up what is pilot start up running the new system for one group of users rather than for all users
Systems Implementation - Start up what is parallel start up running both the old and new systems for a period of time
Systems Implementation - Start up what are different ways to start up? direct conversion, phase in, pilot start up, and parallel start up
Systems Development Approaches what is traditional SDLC systems investigation, systems analysis, systems design, systems implementation, and systems maintenance and review
Systems Development Approaches what is prototyping? iterative approach to systems development
Systems Development Approaches what is rad? (rapid application development) Employes tools, techniques & methods designed to speed application development and reduces paper based documentation, automatically generates program source code & facilitates user participation
Systems Development Approaches What is end user development Any systems development project where the primary effort is undertaken by a combination of business managers and users. IS professionals offer guidance & support
four types of systems development approaches Traditional SDLC, prototyping, rad, end user development
Created by: U223187



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