The purpose of this study is to develop indicators of key performance for hostels with a sustainable framework. In order to develop such objective indicators, this study employed a modified Delphi technique. A panel of 16 academic researchers in tourism provided input into developing the indicators. After three rounds of discussion, the panel members reached consensus on the set of indicators. Passing the result of studies, this research will construct an evaluating pattern of the key performance of the competitive advantage to evaluate the standard operational procedure (sop) of the hostels.