How does one call a person who is next in line within a business process?

A business process consists of several consecutive steps, such that if a process flows from one step to another then the pair of steps is considered single-way connected. How does one call a person or a team which is fed with results from previous step to begin their work?

For example, on a car production pipeline, painting only starts when each detail is ready to: cut, pressed, and welded. So, painting stage "consumes" prepared components.

What is a proper name, in general, for a person or team in such a relationship?

I have several alternatives, and all of them seems unsuitable for me:

consumer — one is called a consumer when she actually gets a complete result, not intermediate one;
customer — same;
next-in-line — too general, too impersonated;
stakeholder — too general.

Solution 1:

Downstream (deliverables) is the popular term in the software industry. Similarly, upstream is also used to denote the predecessor step.

Solution 2:

A dependent step is one that relies on a previous step to occur. It doesn't necessarily mean next-in-line exclusively, but certainly it can be used with appropriate verbiage (upon what does it depend?).

Usage example: