Time administrator?

Dear all,

I am trying to setup the email for ESS leave approval recently.

And in the process I find that there are a "Time Administrator", which will:

1) Receive email when there are error while posting

2) The error workflow will go to the Time Administrator's worklist

And my question is?

1) How can I indicate who is the Time Administrator, or how can I setup one?

2) Where the "Time Administrator's Worklist" locate?

Thanks in advance

Regards

Bill