[Alternative] (or representative of those who will use it [i]) [Role] To consider it in use and question its operability, and the effect of deviations [Name] 
User
S t u d y l e a d e r
R e c o r d e r
D e s i g n e r
U s e r
S p e c i a l i s t
M a i n t a i n e r