Backorders can come as the result of entirely to many different factors all of which equally frustrating and detrimental to a company’s relationship with their customers and also to the company’s internal functions. (Golfmkv)

We have compared the operating regimes by observing a set of performance measures such as the average inventory levels, the average backorder size, the average backorder levels, the probability of backorder and the average number of set-ups. (Ingenta Connect)

It's still true that backorders take a serious toll on customer goodwill and bottom-line results. (Multichannel Merchant)