Every merchant is tempted to think that they'll be able to sell whatever they bring in, but it rarely happens that way. If you plan inventories too heavily, you'll likely wind up with heavy markdowns which decimate profits. If you plan inventories more prudently, you'll likely still be able to generate sales increases by driving your sell through, while protecting your margins and profits.
Step 4: Develop detailed purchasing plans for the remainder of the season
These plans should be a direct function of your sales and inventory plans and should detail items, delivery dates, quantities by delivery date, and vendors. Focus your purchases on your best selling items. Clearly communicate your needs to your vendors, and seek out alternative sources if your primary vendors aren't positioned to meet your needs. Don't assume that if you can't get it from your primary vendor that you can't get it.