2. Method of Data Collection
The method of data collection for this study was a field survey. The questionnaires were distributed to manufacturers by mail, e-mail, interview, seminar session, and telephone interview. The manufacturer list from the Department of Industrial Works (DIW) was adopted for this survey. The survey included the manufacturers who had their own trucks for product delivery to wholesalers, distributors, customers or part makers. Field survey conducted within the framework of this study reviewed the attributes used in
transportation planning to develop a mechanism to lower energy use in transportation especially inefficiency of truck runs by manufacturers.