Waterfall development

<p>The <a class="wikilink" href="/product_requirements_document/">Product Requirements Document</a> has to be very well defined and validated as much as possible for this type of development. An alternative is <a class="wikilink" href="/agile_development/">agile development</a>. </p> <ul> <li>It is very structured</li> <li>Defined stages<ul> <li>You only move from one stage to the next once the previous is completed</li> </ul> </li> <li>Detailed specifications</li> <li>All requirements are fully laid out</li> <li>Budgeting is accurate</li> <li>Less day-to-day management <strong>But</strong></li> <li>Maybe you don't fully know the requirements</li> <li>It is difficult to make changes</li> <li>Unknowns may impact timelines</li> <li>Market conditions change during development</li> </ul>