36th EFCLIN Congress and Exhibition, Glasgow, Scotland, October 11, 2008

Hands-on Demand Forecasting & Planning Workshop, Shanghai, PRC, July 29-30, 2008

28th International Symposium on Forecasting, Nice, France, June 2008

West Jersey Chapter APICS, E.Hanover, NJ, February 21, 2008

"Demand Forecasting in the Supply Chain"    

27th International Symposium on Forecasting, New York, NY, June 2007

"Describing Demand Uncertainty in an FSS"

SAS Forecasting Conference, Cary, NC, June 2007, Keynote Talk

"Trends in Business Forecasting - A 25 Year Perspective"

NY INFORMS Luncheon, New York, NY, October 18, 2006

"Some Personal Perspectives on Demand Forecasting - Past, Present and Future"

26th International Symposium on Forecasting, Santander, Spain, June 2006

"Measuring Field Sales Forecast Accuracy in a Collaborative Environment"

25th International Symposium on Forecasting, San Antonio, TX, June 2005

"Implementing a Forecast Support System for Healthcare Management", with M. vanden Hende

24th International Symposium on Forecasting, Sydney, Australia, June 2004

"Determining the Impact of Innovations on Sales Data", with E. Melnick, NYU, A. Tenenbein, NYU

"A Multivariate Approach to Forecasting Lumpy, Intermittent Demand for Inventory and Merchandising Applications", with W. Sichel, Revlon, Inc.

23rd International Symposium on Forecasting, Merida, Mexico, June 2003

"Forecasting Intermittent Demand for Inventory Planning", with W. Sichel

22st International Symposium on Forecasting, Dublin, Ireland   June, 2002

"Creating a Forecasting Model For Intermittent Demand at Store Locations"
"Creating an Analytical System for Forecasting Customer-Centric, Operational Demand"
XVI National and VII Andean Telecommunications Congress, Cartagena, Columbia   October 2001

"Practical Tools and Techniques for Telecom Forecasters"
Abstract:  Over the years new technologies have to led to an explosive use of statistical data in all kinds of forecasting and planning operations. Forecasting practitioners have not fully taken advantage of these techniques in their systems, modeling methods and decision support implementations. To help improve forecasts, we will provide a framework for a data-driven forecasting process that results in efficient uses of modern computing power and Internet solutions for more accurate, reliable and defensible forecasting practices.

Forecasting telecom demand has, in part, evolved as a means to examine past historical patterns to predict the future using statistical techniques, assuming the future would closely follow the past. Practical experience often fails to adhere to this approach. Nevertheless, an effective forecasting process utilizes data-analytic tools and techniques to prepare, execute, evaluate and reconcile forecasts in many telecom applications. In this talk, we will describe the role of statistical data analysis in projecting the demand for a wide variety of telecom forecasting applications.

21st International Symposium on Forecasting, Pine Mountain, GA   June, 2001

"Making Sense of Data Proliferation in Sales Forecasting"
International Communications Forecasting Conference, Crystal City, VA   June, 2001, Keynote Talk

"The Data Revolution In Forecasting"

20th International Symposium on Forecasting, Lisbon, Portugal   June, 2000

"Exploring Components of Variability in Weekly Point-of-Sale Data",
19th International Symposium on Forecasting, Washington, DC, June 1999 

"Seasonality and Promotions in Weekly Retail Sales Data"

18th International Symposium on Forecasting, Edinburgh, Scotland, June 1998 

"Dealing with Seasonality and Promotions in Weekly Retail Sales Forecasting"

"Automated Empirical One-Tailed Prediction Intervals for Determining Safety Stocks", with W. Sichel, Monet Group

17th International Symposium on Forecasting, Bridgetown, Barbados, June 1997 

"Achieving Forecasting Excellence in the Supply Chain"

16th International Symposium on Forecasting, Istanbul, Turkey, June 1996 

"The Four P's of Effective Demand Forecasting Software"

"Predicting Credit Risk for Corporate Debt Ratings"

"Predicting Short-Term Sales Cycles with Weekly Point-Of-Sale Data"

15th International Symposium on Forecasting, Toronto, Canada, June 1995 

"Yield Spreads as Predictors of Rating Change fro Fixed Income Bond Issues"

14th International Symposium on Forecasting, Stockholm, Sweden, June 1994 

"Design Issues for a Forecasting System in Operations"

Panel: "What Should Forecasters Know?"

13th International Symposium on Forecasting, Pittsburgh, PA, June 1993 

Panel: "Reflections on Forecasting Software: Is It Meeting Our Needs?"

12th International Symposium on Forecasting, Wellington, New Zealand, June 1992 

Chair:"Forecasting for Management"

11th International Symposium on Forecasting, New York, NY, June 1991 

Panel: "Automatic Forecasting: Present and Future"

"Building Smarter Forecasting Applications with Expert Systems"

10th International Symposium on Forecasting, Delphi, Greece, June 1990 

Informal Working Sessions to Celebrate Tenth Anniversary

9th International Symposium on Forecasting, Vancouver, Canada, June 1989 

8th International Symposium on Forecasting, Amsterdam, The Netherlands, June 1988 

"Graphics: An Aid to Forecasters"

7th International Symposium on Forecasting, Boston, MA, May 1987 

"Expertise in AutoCast"

"Developing a Growth Model For Short-Term Planning - Graphical Data Analysis and a Compound Poisson Point Process", with Lilian Shiao-Yen Wu

Also Attended:

6th International Symposium on Forecasting, Paris, France, June 1986 

5th International Symposium on Forecasting, Montreal, Canada, June 1985 

4th International Symposium on Forecasting, London, UK, June 1984 

3rd International Symposium on Forecasting, Philadelphia, PA, June 1983 

2nd International Symposium on Forecasting, Istanbul, Turkey, June 1982 

1st  International Symposium on Forecasting, Quebec City, Canada, June 1981 

Articles

Global Contact

            "PEERing into the future: Why More Accurate and Reliable Forecasts Improve Inventory Planning"

            by Hans Levenbach, Ph.D., Global Contact, 49 - 2008, 14-16. Download a copy here.

Manufacturing Systems

"PC-based software from Delphus helps planners collaborate on forecasting"
by Robert A. Geller. Manufacturing Systems, September 1998, pp. 76-77.
"One group is from Mars, the other from Venus.  Marketing people are blue-sky optimists; operations people, dour realists.  Marketing people are revenue driven; operations people think in terms of units that need to be produced."

APICS

"The Art and Science of Forecasting: How to Achieve Excellence in Demand Planning"
by Hans Levenbach, Ph.D., APICS – The Performance Advantage, December 1996.

Transportation and Distribution

"Good Planning Software Spans Corporate Cultures"
by James G. Thompson, Transportation and Distribution, 1993.

APICS

"AUTOCAST II –. A Software Review",
by Len Tashman, Ph.D. and Christel. Labbe, APICS – The Performance Advantage, September 1992. This is a software review of the forecasting engine employed in PEER Planner for Windows

Production and Inventory Management

"Tying the Forecasting Process into Finite Scheduling"
by Hans Levenbach, Ph.D. and James G. Thompson, Production and Inventory Management, January 1992.

P&IM Review

"Turning Marketing Data into Useful Forecasts"
by Hans Levenbach, Ph.D. P&IM Review with APICS News, March 1991.