Stephan creates software to forecast retail sales and calculate order proposals: lots of time series, with an emphasis on fast, automatic, and robust data cleansing and forecasting. His main responsibilities include the algorithmic and statistical aspects of the Unified Demand Forecast, Demand and Inventory Planning, Predictive Demand Planning, and Predictive Replenishment, SAP's forecasting-related solutions for the retail sector. Stephan is a Deputy Editor for the practitioner-oriented forecasting journal Foresight: The International Journal of Applied Forecasting and an Associate Editor for the International Journal of Forecasting, both published by the International Institute of Forecasters. He is an Honorary Researcher at the Centre for Marketing Analytics and Forecasting at Lancaster University Management School and a Fellow of the International Institute of Forecasters. Stephan authored, with Enno Siemsen, an accessible forecasting textbook: Demand Forecasting for Managers (2016), by Business Expert Press. A much expanded later book is Demand Forecasting for Executives and Professionals (2023), with Bahman Rostami-Tabar and Enno Siemsen, published by Routledge/CRC Press. This book is freely available at https://dfep.netlify.app/.
Stephan creates software to forecast retail sales and calculate order proposals: lots of time series, with an emphasis on fast, automatic, and robust data cleansing and forecasting. His main responsibilities include the algorithmic and statistical aspects of the Unified Demand Forecast, Demand and Inventory Planning, Predictive Demand Planning, and Predictive Replenishment, SAP's forecasting-related solutions for the retail sector. Stephan is a Deputy Editor for the practitioner-oriented forecasting journal Foresight: The International Journal of Applied Forecasting and an Associate Editor for the International Journal of Forecasting, both published by the International Institute of Forecasters. He is an Honorary Researcher at the Centre for Marketing Analytics and Forecasting at Lancaster University Management School and a Fellow of the International Institute of Forecasters. Stephan authored, with Enno Siemsen, an accessible forecasting textbook: Demand Forecasting for Managers (2016), by Business Expert Press. A much expanded later book is Demand Forecasting for Executives and Professionals (2023), with Bahman Rostami-Tabar and Enno Siemsen, published by Routledge/CRC Press. This book is freely available at https://dfep.netlify.app/.