You're describing a perfect case for moving from manual guesswork to a data-driven replenishment program. The most effective solution combines specialized software with a fulfillment partner's execution. The software (an advanced Inventory Management System or part of an OMS) uses historical sales data, seasonality, and even promotional calendars to generate a predictive forecast for each SKU at each store location. It automatically creates purchase orders or transfer orders when inventory hits a predefined reorder point. However, the software alone isn't enough. You need a fulfillment partner whose operation is built to act on these signals. They receive the automated order, pick the exact quantities for each store, palletize or cartonize them by location, label them for easy receiving, and ship them out on a set schedule (e.g., weekly route). This turns replenishment from a reactive headache into a proactive, hands-off process. The partner's system should integrate directly with your software for end-to-end visibility. For a detailed overview of how this integrated service works from forecasting to final-mile delivery to store shelves, this guide on retail replenishment services outlines the model clearly.