Work item type is important it enable you to define work item type. To create new on

<div class="MsoNormal" style="margin:0 0 10pt;">You need to do as below:</div> Steps 1:
Go to Process template Folder –> “WorkItem Tracking” –>

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<div class="MsoNormal" style="margin:0 0 10pt;">Open WorkItems.xml file using visual Studio or XML editor </div> This file has four parts which are Work item type definition, Link Type definition, Categories, Queries. In the element, add a new node as below:

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Steps 2:

<div class="MsoNormal" style="margin:0 0 10pt;">Before that you have to create ProjectManagement.xml file into the TypeDefinitions folder.Coping the layout of existing file and then add changes on there.</div> Steps 3:

<div class="MsoNormal" style="margin:0 0 10pt;">After that you have to upload the template to get the impact. </div>