What do you think about writing a tally sheet for measuring the quantity and system-response-time of specific interactions?
My goal is to identify the most frequent interactions and to categorize these by the time it takes the system to response. With the resulting data I am planning to write down ux requirements regarding minimum expectations the users have at the moment. Background: There is an anfounded but weighty requirement from the upper-management which says that the redesign of the application has to be done with a web-client - of course not considering the users expecations and habbits.
Do you think this is a useful approach - or is there another/better way?