There are two doors into your organization and they are independent. Plenty of organizations open both.
This article is for administrators deciding how applicants first reach them.
A general application form, and applying at the opportunity level.
They are independent. Opening one does not close the other.
When you want to talk to people before pointing them at a role.
One form, published wherever people find you. Everyone who submits it arrives in one place for you to review, before they have picked anything specific.
When the roles are self-explanatory and you would rather people self-select.
You publish what you need, and someone picks the thing they want and applies or registers for it directly.
The set of rules deciding what someone has to do before they count as approved for a given opportunity.
Every opportunity can carry its own. That is what lets one opportunity ask for a background check while another asks for nothing.
A recruitment workflow can be:
One shared form.
Most organizations that end up with a form per opportunity wish they had started with one shared form. Split it later, once you know which opportunity genuinely needs different questions. Merging two forms after the fact is harder than splitting one.