Upstream Process

Any work unit or process or operation that supplies inputs, goods, services, components, etc. to another unit or operation is an upstream process. Upstream process simply refers to a process or work that happens before any other process or work.

Conversely…

Any work unit or process or operation that receives inputs, goods, services, components, etc. from another unit or operation is a downstream process. Downstream process simply refers to a process or work that happens after any other process or work.