<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="concept" /> <meta name="DC.Title" content="Common methods of estimating installation time" /> <meta name="abstract" content="Use the following information to understand the different ways to estimate installation time." /> <meta name="description" content="Use the following information to understand the different ways to estimate installation time." /> <meta name="DC.Relation" scheme="URI" content="rzahcswsesttime.htm" /> <meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" /> <meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="commonmthdsestupgrade" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>Common methods of estimating installation time</title> </head> <body id="commonmthdsestupgrade"><a name="commonmthdsestupgrade"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Common methods of estimating installation time</h1> <div><p>Use the following information to understand the different ways to estimate installation time. </p> <div class="p">The following list contains the most common methods of estimating your installation time for an upgrade. <ul><li>Base your estimate on the installation time of a previous release. If the system configuration and load remain similar, you can use the installation time of a previous release on this system <em>as the start</em> of your estimate. If you rely on only the installation time of the previous release, your estimate might not be accurate. <p>This method is not accurate if many data conversions occur during the installation process. If you are skipping a release level, generally the time is longer. Be sure to add information for conversions that occur in the release you are skipping and for the new release.</p> </li> <li>Base your estimate on the installation time for a similar system. If your enterprise has multiple systems, you can record the actual time to install the new release on one system. You can use this to estimate the time that is needed to install the new release on a system with a similar configuration and load. Of course, you cannot use this method until you complete the installation on the first system.</li> <li>Estimate time using a formula. You can use the information in the following sections to estimate how long it will take to install this release on your system. Keep in mind that the number at which you arrive will vary from your actual installation time because of the variables that affect installation time.</li> <li>Combine one or more of the methods that are listed above.</li> </ul> </div> </div> <div> <div class="familylinks"> <div class="parentlink"><strong>Parent topic:</strong> <a href="rzahcswsesttime.htm" title="Use this information to help you estimate the time it will take to install your new release.">Estimates for software installation time</a></div> </div> </div> </body> </html>