WO Completion in Wireless Maint. User Work bench

Hi Experts

I will be using Mobile PDA in which Wireless Maintenance User Workbench responsibility will be used.

What weird i found on WO completion page of this responsibility is that We have to enter Duration alongwith Start Date-Time unlike Maintenance Super User responsibility where WO Start Date-time and End Date-time is asked on WO completion and duration is calculated automatically.

Its impractical for user to Enter duration like 0.02 Hours taken for WO completion because calculating 0.02 hours will be challenge itself from minutes.

it should be same like Maint Super User where Start and End time is asked and duration is calculated automatically.