1.

(1 mark) As a designer, can you test your design on yourself using yourself as a user? _______

(5 marks) Give five reasons why or why not?

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5.

2. In the case study, Set Phasers on Stun, an operator of a radiation machine makes an error and corrects it quickly. The correction is faster than the design allows for, sending the machine into an unexpected and dangerous mode.

( 4 marks) Explain how the designers could have anticipated that this situation could happen.