Scenario planning for long-term forecasting typically involves defining the scope and time horizon of the forecasting, identifying the key drivers and uncertainties, creating and describing multiple scenarios, analyzing and comparing the scenarios and their implications, and monitoring and updating the scenarios and forecasting. To begin, you must decide which aspects of your business you want to focus on and how far into the future you want to look. Then, you must identify the factors that influence your business (drivers) as well as those that are beyond your control (uncertainties). After that, use creativity to craft stories that illustrate how the future may look under each scenario. You can also use scenario matrices or axes to help generate different scenarios. After analyzing each scenario's effect on key performance indicators, you must assess the robustness and flexibility of your current strategy and plans. Finally, track changes in drivers and uncertainties to update your forecasting.