The invention is directed to facilitating the planning and ordering of a merchandising unit and associated products. A merchandising unit planning screen is presented that displays a representation of a merchandising unit having holders for holding and displaying the products. A product menu is provided for each holder to allow selection of a product from a set of products for each respective holder. Available choices in the product menu of at least one holder are constraining to a subset of the set of products based on predetermined criteria. For each holder for which a product has been selected, a product quantity is determined based on a capacity of the respective holder. An order is generated based on the selected products.