Traditionally, this was done with the TIME/ post command when we used a CLS file, but there is no OOTB event to do the equivalent. You can do this if you are experienced with posts.
Within the post, you need to add the time to $mom_machine_time.
If you have an event for your inspection, then in the proc for this event, you can adjust the time.
If you do not have an event, then you can either create a new UDE for time, or add a replacement MOM_text proc to account for the TIME major word.
You can add additional cutting time and non-cutting time during posting for each operation (for any reason). The variables you should use are mom_sys_add_cutting_time & mom_sys_add_non_cutting_time. They get zeroed at the start of each oper. These extra times will be added to the total mom_cutting_time & mom_machining_time. When the additional time is passed to the post using these 2 variables, it will get accumulated.