<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Uses for Tolerance Stackup Validation</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <div class="title_topic1" id="xps10_pagetitle">Uses for Tolerance Stackup Validation</div>
      <hr noshade="true">
      <p class="para_topic">Some of the most important benefits of using Tolerance Stackup Validation (TSV) are:</p>
      <ul>
         <li>
            <p class="para_item">Testing whether dimensions and tolerances have been properly applied.</p>
         </li>
         <li>
            <p class="para_item">Giving a clear indication of build and no-build conditions by identifying the minimum and maximum conditions and contributors.</p>
         </li>
         <li>
            <p class="para_item">Providing a means to remove sources of assembly and part variation problems early in the product and tooling design.</p>
         </li>
         <li>
            <p class="para_item">Identifying opportunities to loosen tolerances, thereby enabling manufacturing cost savings.</p>
         </li>
         <li>
            <p class="para_item">Reduced volume of engineering changes, improved part yields, better fitting of parts and fixtures, and better overall assemblies that fit the first time.</p>
         </li>
      </ul>
      <p class="para_topic">TSV can be used during the conceptual design phase (when, at most, only rough geometry and solids from concept sketches are defined) to:</p>
      <ul>
         <li>
            <p class="para_item">Verify and compare design alternatives</p>
         </li>
         <li>
            <p class="para_item">Determine if the concept will meet criteria constraints</p>
         </li>
         <li>
            <p class="para_item">Compare a new design concept with an existing design</p>
         </li>
         <li>
            <p class="para_item">Select the preferred design alternative.</p>
         </li>
      </ul>
      <p class="para_topic">It can be used during model development to:</p>
      <ul>
         <li>
            <p class="para_item">Perform first-level verification of the tolerances</p>
         </li>
         <li>
            <p class="para_item">Identify contributors to overall verification, so they can be tracked and reduced as necessary</p>
         </li>
         <li>
            <p class="para_item">Identify key contributors to assembly fit</p>
         </li>
         <li>
            <p class="para_item">Establish higher levels of confidence in designs, and reduce the number of downstream engineering changes.</p>
         </li>
      </ul>
      <p class="para_topic">TSV can also be used during tooling design, when the fixtures and jigs used to manufacture the parts are being assembled. During this phase, TSV can:</p>
      <ul>
         <li>
            <p class="para_item">Validate the tolerance scheme</p>
         </li>
         <li>
            <p class="para_item">Identify contributors to tooling assembly variation</p>
         </li>
         <li>
            <p class="para_item">Minimize fixture variation</p>
         </li>
         <li>
            <p class="para_item">Optimize clamping position, tolerance values, assembly sequence, etc.</p>
         </li>
         <li>
            <p class="para_item">Reduce tooling rework costs and the assembly learn-out time.</p>
         </li>
      </ul>
   </body>
</html>