Using SFX to Identify. Unexpressed User Needs. Mark G. Stengel. ABSTRACT. Usage statistics provided by an OpenURL link resolver can help describe user .Identification of users ' needs is the first, and arguably the most important, step in unexpressed needs - when the people are 'aware of their needs but do . - In order to detect the unexpressed needs of your customers, you need to look for clues and have your "radar on and antenna up." Here are a .