Case Timer

SOLVED

Hi

we have a client who want to setup 3 metrics on cases - example of one metric is that on the case they have a field called first response in and have 2 options to select from, 1 hour or 30 mins

when they send the first response this is date stamped and if this date is less than the case created date/time and the first response in selected then need to show that the first response has succeeded, but if they place the case on waiting then the timings need to pause

has anyone done anything similar before that could provide me with an idea on how to achieve this

they also have a site response in and resolve in fields that i need to do the same thing for