1. INTRODUCTION
Currently, systems professionals, IT business practitioners, analysts and designers are on-the-job of creating modern and improved techniques for systems development and commercial information systems engineering domain, Beynon-Davies et al (2002). Due to competitive pressures and cost increase in business endeavors, organizations seek ways of doing business that are effective and less consuming time, hence Rapid Application Development (RAD) and Object-Oriented Analysis and design (OOAD), Boehm et al (1997).
This essay reviews the history of RAD and OOAD as recently emerged information systems development methodologies distinguished for high levels use of iterative prototyping and customer involvement, analyzes their features and observes the comparisons between the two.
2. RAPID APPLICATION DEVELOPMENT
2.1 History of RAD
In response to the 1970s traditional life-cycle drawbacks, Barry Boehm introduced his Spiral Model which implemented software prototyping as a way of reducing risk and Tom Gilb’s Evolutionary Life Cycle which emanates from the concept of evolutionary prototyping rationale whereby prototypes are built then developed into the final product. These prior works were the basis for Scott Shultz’s Rapid Iterative Production Prototyping (RIPP) at DuPont. James Martin in 1991 then extended the work done into a more formalized process now called Rapid Application Development (RAD). The RAD approach incorporates developing and refining data models, process models, and prototype through an iterative process.
2.2 Features of RAD
Rapid Application Development is a methodology that promises organizations the ability to develop and deploy strategically important systems more quickly, while simu...
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18. Systems analysis and design written by Alan Dennis and Barbara haley Wixom. After studying Chapter 1, pages 8-14, 20 and chapter 16, pages 446-476, 499-501.
19. Systems Analysis and design – An active Approach George M. Marakas Chapter 1 pages 25, 26, 28 and Chapter 7, pages 196-205.
20. Introduction to system analysis and design: A structured approach by Penny A Kendall Chapter 14 pages 406-408
21. System analysis and design methods by Jeffrey L. Witten and Lonnie D. Bentley Chapter 9, pages 316, 317, 345 and chapter 16 page 534-549.
22. http://www.exsys.com.sg/services/4D%20Princlipals.htm
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The project would be created on the Linux distribution Ubuntu and should make use of modern design practises such as entity relationship diagram modelling for the database schema. The application itself should be object oriented and be designed with the aid of The Unified Modelling La...
This system will be based on making choices for the support system. It can be used by manger and senior in a business and they will get information about how the business how it operate and they can see and manage how efficient a company like John Lewis is
University of Phoenix. (Ed.). (2002). Introduction to business systems development. [University of Phoenix Custom Edition e-text]. Boston: Pearson Custom Publishing. Retrieved January 16, 2005, from University of Phoenix, Resource, BSA/375Business Systems Analysis website: https://mycampus.phoenix.edu/secure/resource/resource.asp
The system development life cycle, also know as the SDLC, is the process of designing and developing a system or software to meet certain requirements. (“System development life,”). This cycle involves many different phases, in which the system is planned, analyzed, designed, implemented, and tested. There are five major phases in the system development life cycle: systems planning, systems analysis, systems design, systems implementation, and systems security and support. Each of these phases has a particular responsibility and certain tasks are perfumed in each phase.
The System Development Life Cycle (SDLC) plan includes six phases. These six phases are The Preliminary Investigation Phase, The Analysis Phase, The Design Phase, The Implementation Phase, and The Maintenance Phase. (1) If this plan had been followed there would have probably been much different results.
Software applications are powerful tools in the battle to make businesses more efficient and effective. Many have tried to make do with commercial off-the-shelf software (COTS), only to find that their specific needs demanded professionally developed software. Others insist on reinventing the wheel by developing software in areas where vendors are offering an already mature, reliable and relatively cheap version to buy.
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A Software Development Model is a framework that is used to structure, plan, and control the process of developing an information system. These are various processes or methodologies that are being selected for the development of the project depending on the project’s aims and goals. There are many development life cycle models that have been developed in order to achieve different required objectives. This report aims to compare the following software development models: Waterfall, Prototyping, Rapid Application Development (RAD), and Agile.
Step 2: Model Building – aims at representing the real world influences between the variables of interest in an suitable layout. This may be applied using a quantitative approach such defining a system of simultaneous Ordinary Differential Equations (ODEs) or linear programming or a qualitative approach such as a structural dependency representation using causal diagrams. There are other hybrid methods which can be adopted, which combine quantitative and qualitative techniques.
Trade-studies are used to figure out the best possible approach. Trade studies functions includes improving a particular aspect of the system design to figure out the best approach to be used given a well-defined set of technical choices and parameters [1]. The inputs of the trade study are the DDP of competing technical solutions or just one widely variable solution. These inputs can consist of models of those technical solutions, the stakeholder’s priority ranked operational requirements, system life-cycle considerations, and other data. The output of a trade-study is a decision on which technical route to follow based on the desired characteristics of the system within the alternatives being studied. The trade-study will also document the justification of the decision. The goal of this section is to explain the process that provides the trade study its justifying power, a little more detail on those inputs and outputs, when and how many trade studies are conducted, what the sensitivity analyses are, and how alternatives are analyzed are related to trade-studies.
The three types of systems development methodologies that we have chosen are Prototyping Methodology, Joint Application Development(JAD) Methodology and Rapid Application Development(RAD) Methodology.