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1 Technology Diffusion and Long Term Forecasting: Application to Growth of Wireless Mobile Services AT&T Symposium August M. Hosein Fallah, Ph.D. Elias Aravantinos Wesley J. Howe School of Technology Management Stevens Institute of Technology Hoboken, NJ MHF/EA August 2006 Slide No. 1 Wesley J. Howe School of Technology Management
2 Outline Forecasting Technology Diffusion Modeling growth of Wireless services Problems with Mobile Diffusion Forecasts Case Analysis for Greece Issues and observations Implications of the study Future Research MHF/EA August 2006 Slide No. 2 Wesley J. Howe School of Technology Management
3 Forecasting People do forecasts all the time o Manufacturing o Sales o Financial performance o Natural phenomena o Short term forecast Daily weather o Long term Global warming MHF/EA August 2006 Slide No. 3 Wesley J. Howe School of Technology Management
4 What is Diffusion? Diffuse means spread out, scatter, pour in different directions Webster Dictionary Diffusion of an innovation is the process by which innovation is communicated among and adopted by the members of a social system MHF/EA August 2006 Slide No. 4 Wesley J. Howe School of Technology Management
5 Technology Diffusion People naturally resist change The adoption behavior for a new technology tends to follow an S curve Common diffusion models: Bass, Gompertz, Fisher-Pry The growth pattern of a new technology can be represented in general by a function of the form f ( e g ( t ) ) % Adoption, Y Time, t The S Curve MHF/EA August 2006 Slide No. 5 Wesley J. Howe School of Technology Management
6 The Gompertz Model The Gompertz model is asymmetric, with the adoption rate slowing down as it progresses The formula for the Gompertz model can be written as : y(t) = e -e-b(t-a) Where a is the year the growth reaches the inflection point on the curve. This point normally correspond to 37% of the saturation level b measures the speed of diffusion MHF/EA August 2006 Slide No. 6 Wesley J. Howe School of Technology Management
7 Diffusion of Some Past Innovations MHF/EA August 2006 Slide No. 7 Wesley J. Howe School of Technology Management
8 Wireless Saturation Level Diffusion of most technologies in the past was bounded by the total population. Saturation levels were below 1. Wireless mobile has changed the paradigm Everyone above age 10 can carry a cell phone. Some people may have multiple phones or multiple SIM Cards. In some countries Wireless mobile penetration has already past 100% So, where is the ceiling? MHF/EA August 2006 Slide No. 8 Wesley J. Howe School of Technology Management
9 Wireless Growth for Selected Countries (Actual) UK Italy Greece USA Wireless Growth (Density) Year MHF/EA August 2006 Slide No. 9 Wesley J. Howe School of Technology Management
10 Wireless Growth for Selected Countries (Forecast) Actual Forecast with Gompertz Italy UK Greece USA Wireless Growth (Density Year MHF/EA August 2006 Slide No. 10 Wesley J. Howe School of Technology Management
11 Forecasts with Traditional Models Short term forecasts could be very reliable Accuracy of long term forecasts varies with o Amount of the historical data o Where we are on the S curve o Potential external factors Technological, social, economic factors Methods for improving long term forecasts o Delphi Method o Analogy * and interpolation from similar observations * Yongil Jeon, Kwang Hyun, and Clive Granger (2004) Long-term Technological Forecasting,, Telektronikk MHF/EA August 2006 Slide No. 11 Wesley J. Howe School of Technology Management
12 Approach to Improving Longer Term Forecasts Short Term Historical Data Forecasting Model New Forecast Longer Term Historical Data Forecasting Model New Forecast Other Information Relevant to the Future MHF/EA August 2006 Slide No. 12 Wesley J. Howe School of Technology Management
13 Similarities between Greece and Italy Similarities Greece Italy GDP/capita $23,000 $28,000 APRU $27 $30.2 UMTS services launch Population group years: 66.7% years: 66.8% Total median age MHF/EA August 2006 Slide No. 13 Wesley J. Howe School of Technology Management
14 Wireless Mobile Growth- Italy vs. Greece Growth (Density) Italy Greece- Actual Year MHF/EA August 2006 Slide No. 14 Wesley J. Howe School of Technology Management
15 Actual vs. Forecasts for Greece- Application of Analogy Wireless Growth (Density) Greece Greece from Italy Greece from Gompertz Year MHF/EA August 2006 Slide No. 15 Wesley J. Howe School of Technology Management
16 Issues and Observations Wireless technology is evolving very rapidly Countries are also going through policy changes that affects growth of wireless services Existing diffusion models can not realistically predict growth more than a year or two, particularly for rapidly evolving technologies While the notion of S curve is fundamentally sound, the current models have significant limitations for longer term forecasting because they look only backward and not forward. The logistic models need to be augmented with other forward looking information from the lead markets using analogy to improve long term forecasting MHF/EA August 2006 Slide No. 16 Wesley J. Howe School of Technology Management
17 Implications of the Study Improved models for diffusion of communications technologies will help service providers with better planning for o Infrastructure o Substitution of traditional services with advanced services o Resource management o Global expansions MHF/EA August 2006 Slide No. 17 Wesley J. Howe School of Technology Management
18 Future Work Further assess application of analogy to long term forecasting Improve and generalize the approach as a modified Gompertz model Validate model application and forecast reliability Explore applications to broadband services MHF/EA August 2006 Slide No. 18 Wesley J. Howe School of Technology Management
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