when the project is located in an area familiar to the project manager,prequalification is a simple process of calling on those contractors known to him to have the capability to perform.When the project is an unfamiliar territory,the process is more complicated,requiring good planning,remote and on-site resource survey, the discrete inquiry.The initial step is to prepare a list of all available contractors. A good place to start is the contractsrs'register,the local and nearby phone directories,and information from materials suppliers in the area. If the list is lengthy,it may be necessary to winnow out some names on the basis of location,size,specialty,or any other basic information.Regarding the proper number of contractors on the initial list, certain factors are the followings