Thank you for responding, Svendus. No we don’t work for any camera brand. We are students in an Interaction Design class at USF conducting a usability test for a digital device of our choice. There are six usability goal questions and five design principal questions. The six usability questions relate to efficiency, effectiveness, learnability, utility and memorability (Preece, Sharp & Rogers, 2015, p. 19) The five design principle questions relate to visibility, feedback, constraints, consistency and affordance. (Preece et al., 2015, p. 26).
Reference: Preece, J., Sharp, H., & Rogers, Y. (2015). Interaction design: Beyond human-computer interaction (4th ed.). Chichester, West Sussex: John Wiley & Sons Ltd.