zentao/extension/ipd/durationestimation/config.php

<?php
$config->durationestimation = new stdclass();
$config->durationestimation->index = new stdclass();
$config->durationestimation->index->requiredFields = 'scale,productivity,scale,duration,unitLaborCost,totalLaborCost';

$config->durationestimation->workloadTotal = 100;