Pilot testing prior to formal testing can spare you a ton of aggravation and help you identify multiple ways to make test sessions proceed more smoothly and effectively. For example, pilot test results might lead you to change the order of directed tasks to ensure a realistic work‘ow, adjust how you collect data to ensure completeness and accuracy, and resolve device prototype shortcomings (e.g., ƒx things that are not working properly). Conducting one or two pilot test sessions just days or even hours ahead of formal testing should sufƒce.