As operations and systems become more complex, usability and user experience become increasingly critical. Organizations invest significant resources to enhance usability, yet identifying context-dependent root causes remains challenging. This paper describes a usability study conducted by a Finnish forestry company on a Supervisory Control And Data Acquisition (SCADA) control system. The study utilized academic research to identify key usability attributes and metrics, which formed the basis of a comprehensive usability questionnaire. Analysis of survey responses underscores the importance of situational analysis and identifying cumulative and causal influences on end-user perceptions of usability.