As a Wholesale Distributor you do everything to keep your customers happy. Apart from knowing their needs, regular contact moments and providing suggestions to improve their business, you want to make sure to deliver as promised at all times.
At the same time investing in stock is expensive, predicting stock levels in the future is hard to do and your suppliers might not always deliver in time. It is business critical to know when a Sales order cannot be delivered in time or in full! This so you can act before your customer is facing a late receipt.