Rasul, Tahir creator Sharif, M. N. Chairperson Techapun Raengkhum Examination Committee Tang, John C.S. Examination Committee The Royal Danish Government Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1978 continuing eng 23 p. This work deals with the error estimation for technol ogical substitution models. By the use of actual data, errors have been calculated for the Floyd, Fisher-Pry, Blackman and Generalized models. A relationship is found, as to the manner in which error varies due to changes in forecasting horizon. From the result, conclusions about relative efficiency of the four models are also presented. A special study submitted in partial fulfillment of the requirements. for the degree of Master of Engineering. Special Studies Project Report (M. Eng.) - Asian Institute of Technology, 1978 Technological forecasting Errors Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B22610 http://203.159.5.9/ait-thesis/detail.php?q=B22610 121095 20260818100438.0