保险服务办公室（ISO）是领先的火灾保险数据和分析公司 并为财产保险公司提供风险分析和分类服务 工业保险公司及其代理人可在公共保险期间使用ISO提供的评级 承保和评估保险费的保护分类调查。2004年，ISO完成了奥兰多市的公共保护分类调查。 在调查期间，ISO根据奥兰多消防局对奥兰多市进行了评级， 奥兰多公用事业委员会（OUC）负责供水和通信。水 成分占分类和消防栓流量测试的40% 都包括在水的分数里。本文关注的是这项调查的一个独特方面，即OUC对 用计算机水力模型代替实际现场流量试验。包括表格，数字。

Insurance Services Office, Inc. (ISO) is the leading fire insurance data and analytics company and provides risk analysis and classification services to the property insurance industry. Insurers and their agents may use the ratings produced by ISO during Public Protection Classification surveys for underwriting and evaluating insurance premiums. In 2004, ISO completed a Public Protection Classification survey for the City of Orlando. During the survey ISO rated the City of Orlando based on the Orlando Fire Department, the Orlando Utilities Commission (OUC) water supply, and communications. The water component accounted for forty percent of the classification and fire hydrant flow tests were included in the water score. This paper focuses on a unique aspect of this survey, OUC's use of a computer hydraulic model in lieu of actual field flow tests. Includes table, figures.