The inventory receipt plan serves several important functions. First, it serves as the inventory purchasing plan for future months. While it doesn't tell you specifically what to buy, (you need an assortment plan for that), it does tell you how much you need to by for receipt in each month. Second, because inventory purchases are typically the most significant cash outflow for a small retailer, the inventory purchasing plan serves as a critical input into a financial cash flow plan.
The completed Open-To-Buy plan also enables a small retailer to evaluate, before the season starts, critical inventory productivity metric like inventory turnover and gross margin return on investment GMROI) (see "Measuring Inventory Productivity"). These are critical measures of the productivity of the inventory investment, and evaluating the planned turnover and GMROI allows the small retailer to pro-actively manage these metrics for continual improvement.
A completed Open-To-Buy plan establishes the critical benchmarks for evaluating exactly where you are once you get into the season. It's after the Cheap Cigarettes Online USA season gets underway that an Open-To-Buy truly earns its keep. In season, key decisions have to be made about what to reorder, what to back off on, and how to allocate any remaining Open-To-Buy dollars.