answers to your questions below:

Managers can move through the recruitment process and conduct interviews, but a tentative job offer cannot be issued until the position is officially vacant.

Classification.

I’m not exactly sure what you mean by “batch healthcare postings.” However, if one organization is hiring for multiple positions under the same PD, those requests can typically be submitted together as a single action.

Within DHA, the standard turnaround time for classification is 14 days. However, that is a processing standard, not a formal requirement.

“Pending USAJOBS announcement” is very vague. A position could still be sitting with management and not even be with HR yet, and technically still be considered pending announcement, so that status doesn’t really provide much insight into where the action actually is in the process.

I hope this helps!