How to write business rule to set Assignement Group and to clear Assigne to On update of Incident?

[KM SN]

I want to set assignment group to 'x' and assigned to to empty when 

1) incident state is changes from resolved to any other except closed.

2) No change of current incident assignment group ( when no change in assignment group while update)

3) when assigned to is abel tuter only

I tried this scenario but not working on PDI, can I expect some inputs?? @Ankur Bawiskar

[Bharath Kumar A]

if i understand your requirement correctly, You can achieve this using following condition without any code.

When to Run:

Actions:

[KM SN]

You can see the defined business rule reflected same as you said but changing state from resolved to IN progress i didn't see any change over incident. I am also attaching screen shot of incident after changing it to Inprogress .

[Bharath Kumar A · Accepted solution]

You can try with before update business rule not after update.

[KM SN]

Thank You!! Its Working May i know what made it happen? why its not happened earlier time?