Metrics for Success - CASTLE Framework

The CASTLE framework is a tool for measuring user experience in internal workplace software. It helps teams understand how employees interact with the tools they use on the job by evaluating six key areas: Cognitive Load, Advanced Feature Usage, Satisfaction, Task Efficiency, Learnability, and Errors.

By using CASTLE, you can identify what’s working well and what needs improvement in your software, ultimately boosting employee productivity and satisfaction. It’s especially helpful for UX designers, product managers, and researchers working on internal applications.

You can use the CASTLE framework during early design phases—like planning, research, or problem framing—to set clear user experience goals and track progress with meaningful metrics.