Enterprise Resource Planning (ERP) systems are vital for managing any modern-day business. These systems aim to facilitate an organization's work by automating and integrating all business information and processes. However, ERP systems suffer from many problems that may cause an implementation failure. Many of these problems are related to usability, which is affected by the complexity of user interfaces (Uls). Usability can be defined in terms of an end-user's efficiency, effectiveness, and satisfactions. A study was conducted in this thesis to inquire about the usability problems that ...