Accommodation, whether in the form of multi stars hotel, inn, motel, villa, or shared accommodations, should be available every where, because tourist requires staying in a place for rest and sleep, and around one third of the total costs of traveling is spent for accommodation only. Of different current categories related to hotels, categorization based on star, from one to five, and based on alphabets, from A to E, can be considered, which represent the quality from highest to the lowest[31]. In Iran, the hotels are mostly known by stars.
Investors, developers, and hotel directors require possibility measurement studies. These studies include competitive analysis, expected revenue and costs and information support, showing the revenue making of a hotel in a certain status[32]. Hotels are classified as following: