Forecasting Sales: A Step Towards Better Inventory Management Sewell Infiniti Jordan Whitteberry
Contacts Rick Cowart Dr. Barr Tim Jordan Whitteberry
Problem and Circumstances Seasonal by months Daily holding cost Lead time Jordan Whitteberry
Purpose Find seasonality of historical sales data Find leading indicators that they can track going forward Jordan Whitteberry
Questions and Decision Are there any local indicators that would track to our sales and help, in a leading manner, indicate the future of our sales? How does that affect ordering of inventory? Which indicators should be used? What focus should the indicators have? How many should be used? What should be done about the missing data for May of 2007? Jordan Whitteberry
General Approach Generate numbers for May Smoothie Find historical data for indicators MLR Jordan Whitteberry
Smoothie PeriodActualTrendSeasonalCyclicalForecastError Jordan Whitteberry
MLR Must use data that is at least three months ahead to compare Searching for a combination of r 2 s that add up to be above 0.5 LIBOR BCI CPI Unemployment Jordan Whitteberry
Taking Unemployment Into Account Jordan Whitteberry
Taking Dallas BCI Into Account Jordan Whitteberry
Variables Period Seasonality Index Cyclical Index Unemployment Rate 3 months prior BCI 6 months prior Jordan Whitteberry
Equations ERROR = * BUSI_CYC ERROR = * UNEMP Trend = * Period Jordan Whitteberry
Final Mathematical Model F = ( * Period) * Seasonality * Cyclical * UNEMP * BUSI_CYC Jordan Whitteberry
Model’s Logic Final Forecast * Period Seasonality * Cyclical * UNEMP * BUSI_CYC Jordan Whitteberry
Issues Unemployment Business Cycle Index Jordan Whitteberry
Interpretation Jordan Whitteberry
Conclusion Unemployment and BCI relate Limited outcome Try personal income and outlays, real estate purchases Try to stay locally focused Jordan Whitteberry