Develop a predictive model for forecasting WIP inventory requirements based on historical data, production schedules, and order forecasts. This model should predict the future volume of WIP inventory needed at different stages of the production process. Use [HistoricalData], [ProductionSchedule], [OrderForecast], and [WIPVolume] as placeholders. The output should be a predictive report showing expected WIP inventory levels at key production stages for upcoming months or quarters.