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<mainDescription>&lt;p>&#xD;
From a&amp;nbsp;development perspective, each iteration provides an increment of functionality to the product. Thus, the&#xD;
end of each iteration corresponds to a checkpoint where the project team demonstrates to stakeholders that the&#xD;
objectives for that iteration have been met.&#xD;
&lt;/p>&#xD;
&lt;p> From a management perspective, the software lifecycle&amp;nbsp;is decomposed over &#xD;
time into four sequential phases, each concluded by a major milestone [&lt;a class=&quot;elementLinkWithUserText&quot; href=&quot;./../../../core.mgmt.common.base/guidances/supportingmaterials/references.mgmt_D80619F3.html#BOE95&quot; guid=&quot;_JlTPUM6aEdyuBO4ZIzcyig&quot;>BOE95&lt;/a>]. &#xD;
There are four major milestones that provide evaluation criteria at the end &#xD;
of each phase:&lt;/p>&#xD;
&lt;p>&lt;b>The phases and milestones of a projec&lt;/b>t &lt;br />&#xD;
&lt;img height=&quot;156&quot; alt=&quot;Click on text for more information about phases and milestones&quot; src=&quot;./resources/co_phas1.gif&quot; width=&quot;406&quot; border=&quot;0&quot; />&lt;/p>&#xD;
&lt;p> Each phase is&amp;nbsp;a span of time between two major milestones and has specific &#xD;
focus and objectives. At the end of each phase, an assessment is performed to &#xD;
determine whether the objectives of the phase have been met. A satisfactory &#xD;
assessment allows the project to move to the next phase. When a milestone is &#xD;
not met, more iterations in the current phase may be performed before the milestone &#xD;
can be considered complete. Achieving a milestone represents an objective criteria &#xD;
with which to measure progress. &lt;/p>&#xD;
&lt;p> At the end of the &lt;a class=&quot;elementLink&quot; href=&quot;./../../../practice.mgmt.risk_value_lifecycle.base/guidances/concepts/inception_phase_C4456871.html&quot; guid=&quot;_0hmKgBOMEduCNqgZdt_OaA&quot;>Inception Phase&lt;/a> is the first major project milestone, or &lt;strong>Lifecycle Objectives &#xD;
Milestone&lt;/strong>. At this point, you examine the cost versus benefit of the &#xD;
project and decide either to proceed with the project or to cancel it. &lt;/p>&#xD;
&lt;p>&#xD;
At the end of the &lt;a class=&quot;elementLink&quot; href=&quot;./../../../practice.mgmt.risk_value_lifecycle.base/guidances/concepts/elaboration_phase_BE880435.html&quot; guid=&quot;_2plxwBOMEduCNqgZdt_OaA&quot;>Elaboration Phase&lt;/a>&amp;nbsp;is the second important project milestone, the&#xD;
&lt;strong>Lifecycle Architecture Milestone&lt;/strong>. At this point, a baseline of requirements is agreed to, you examine&#xD;
the detailed system objectives and scope, the choice of architecture, and the resolution of the major risks. The&#xD;
milestone is achieved when the architecture has been validated.&#xD;
&lt;/p>&#xD;
&lt;p>&#xD;
At the end of the &lt;a class=&quot;elementLink&quot; href=&quot;./../../../practice.mgmt.risk_value_lifecycle.base/guidances/concepts/construction_phase_873B6559.html&quot; guid=&quot;_48EKsBOMEduCNqgZdt_OaA&quot;>Construction Phase&lt;/a>&lt;strong>&amp;nbsp;&lt;/strong>is the third important project milestone,&#xD;
the &lt;strong>Initial Operational Capability Milestone&lt;/strong>. At this point, the product is ready to be handed over to&#xD;
the transition team. All functionality has been developed and all alpha testing (if any) has been completed. In&#xD;
addition to the software, a user manual has been developed, and there is a description of the current release. The&#xD;
product is ready for beta testing.&#xD;
&lt;/p>&#xD;
&lt;p> At the end of the &lt;a class=&quot;elementLink&quot; href=&quot;./../../../practice.mgmt.risk_value_lifecycle.base/guidances/concepts/transition_phase_DD5986E5.html&quot; guid=&quot;__ca5UBOMEduCNqgZdt_OaA&quot;>Transition Phase&lt;/a>&lt;strong>&amp;nbsp;&lt;/strong>is the fourth important project milestone, the &#xD;
&lt;strong>Product Release Milestone&lt;/strong>. At this point, you decide if the &#xD;
objectives were met and whether you should start another development cycle. &#xD;
The Product Release Milestone is the result of the customer reviewing and accepting &#xD;
the project deliverables. &lt;/p></mainDescription>
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