Volume hiring is a funnel with six leaks, and you can only fix what you measure
A bulk hiring campaign looks simple from the outside: source applicants, call them, invite them, hire the ones who turn up. Inside, it is six consecutive drop-offs. Applicants who never get called. Numbers that never connect. Candidates who screen out. Confirmed candidates who do not walk in. Selected candidates who never complete documents. Joiners who leave before the retention milestone your client pays on.
Each of those has a percentage attached, and most agencies know only the first and last. Improving a two-thousand-applicant campaign is rarely about buying more applicants. It is about finding which of the six steps is leaking hardest this month and doing something narrow about it, which requires the numbers to exist in the first place.
The unworked list is the most expensive line in the budget
When two thousand records land in a shared sheet and six callers open whichever rows they see, the bottom of the list is never called. You paid for those applicants. The client counted them in the plan. Distribution rules that split the list by language, city and role, with an owner on every record and an untouched-leads view for the supervisor, recover more joinings than any change to the calling script.