Production order actual start date & time and actual finish date & time

Hi Experts,

I have one production order actual start date & time and actual finish date & time needed clarification as mentioned below,

When I use COOIS for a particular production order and I found the actual start date & time and actual finish date & time, it shows me the actual start date & time (26-12-2009) and finish date & time. (01-1-2009)

Would you please tell me how these dates and time comes from?

Awaiting for your replies.

Note:I need to know about Actual Start and Actual finisnh start date and time.

Cheers,

Kumar.S