643 – Time Series Forecasting and Regression Analysis
Enterprise Business Metric Forecasting
Beatriz Etchegaray Garcia
IBM Research
Yasuo Amemiya
IBM Research
Regularly issued forecasts of various business metrics, such as revenue, cost, and event occurrences, play a key role in tracking and managing business performance. Some forecasts are for next several time periods, while others target specific term summaries such as quarterly totals. In an enterprise business, processes are often organized in a hierarchical and high-dimensional cube structure based on features such as product offerings or geography. Typically, forecasts need to be issued for every cell of the cube and must satisfy certain consistency relationships over the different dimensions. Forecasting for a hierarchical structure of time series is challenging because various components at different levels of the hierarchy can interact in a complex manner. A large number of time-dependent covariates are usually available, although the measurement periods may vary, and missing or unstable measurements are expected in some cells. Desirable forecast properties include reasonable accuracy at various levels or slices of a cube, and stability over time periods. In this talk we present actual enterprise forecasting problems and their challenges. We describe the development and implementation of methods for an operational solution effectively used by business.