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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>System Development Life Cycle Methodologies to Consider</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1" /> <meta name="date" content="2009-04-14T16:11:31Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="System Development Life Cycle Methodologies to Consider" /> <meta name="relnum" content="Release 3.2" /> <meta name="partnum" content="E11947-01" /> <link rel="copyright" href="dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="up" href="preface.htm" title="Home" type="text/html" /> <link rel="up" href="deploy.htm" title="Deploying an Application" type="text/html" /> <link rel="up" href="deploy_ls_method.htm" title="About the Oracle Applicatio..." type="text/html" /> <link rel="up" href="deploy_ls_sdlc.htm" title="System Development Life Cyc..." type="text/html" /> <link rel="prev" href="deploy_ls_method.htm" title="Previous" type="text/html" /> <link rel="next" href="deploy_about.htm" title="Next" type="text/html" /> </head> <body> <p id="BREADCRUMBING"><a href="preface.htm" title="Home">Home</a> > <a href="deploy.htm" title="Deploying an Application">Deploying an Application</a> > <a href="deploy_ls_method.htm" title="About the Oracle Applicatio...">About the Oracle Applicatio...</a> > System Development Life Cyc...</p> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="deploy_ls_method.htm"><img src="dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="deploy_about.htm"><img src="dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <div class="sect2"><!-- infolevel="all" infotype="General" --><a id="sthref2028" name="sthref2028"></a> <h1><a name="HTMDB25794" id="HTMDB25794"></a>System Development Life Cycle Methodologies to Consider</h1> <p>The system development life cycle (SDLC) is the overall process of developing software using a series of defined steps. There are a number of SDLC models that work well for developing applications in Oracle Application Express.</p> <p>The <span class="bold">SDLC waterfall</span> is probably the best known model. In this methodology, the development process is broken down into the following stages:</p> <ol> <li> <p>Project Planning</p> </li> <li> <p>Requirements Definition</p> </li> <li> <p>Design</p> </li> <li> <p>Development</p> </li> <li> <p>Integration and Testing</p> </li> <li> <p>Installation and Acceptance</p> </li> <li> <p>Maintenance</p> </li> </ol> <p>This methodology is referred to as a waterfall because the output from one stage is the input for the next stage. One of the primary problems with this approach is that it is assumed that all requirements can be established in advance. Unfortunately, requirements often change and evolve during the development process.</p> <p>The Oracle Application Express development environment enables developers to take a more iterative approach to development. Unlike many other development environments, creating prototypes is easy. With Oracle Application Express, developers can:</p> <ul> <li> <p>Use built-in wizards to quickly design an application user interface</p> </li> <li> <p>Make protoypes available to users and gather feedback</p> </li> <li> <p>Implement changes in real time, creating new prototypes instantly</p> </li> </ul> <p>Other methodologies that work well with Oracle Application Express include:</p> <ul> <li> <p><span class="bold"><a id="sthref2029" name="sthref2029"></a>Spiral</span> - This approach is actually a series of short waterfall cycles. Each waterfall cycle yields new requirements and enables the development team to create a robust series of prototypes.</p> </li> <li> <p><span class="bold"><a id="sthref2030" name="sthref2030"></a>Rapid application development (RAD) life cycle</span> - This approach has a heavy emphasis on creating a prototype that closely resembles the final product. The prototype is an essential part of the requirements phase. One disadvantage of this model is that the emphasis on creating the prototype can cause scope creep; developers can lose sight of their initial goals in the attempt to create the perfect application.</p> </li> </ul> </div> <!-- class="sect2" --> <!-- class="sect1" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2003, 2009, Oracle and/or its affiliates. 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