Upstream and Downstream definition

requirements
su99-bsa picture su99-bsa · Aug 23, 2013 · Viewed 15.2k times · Source

in my organization they tend to use a nomenclature of "downstream" and "upstream" when they talk about communications between systems. What is the definition of these concepts? Is this standard concepts in the world of IT-development?

Answer

Matt picture Matt · Aug 12, 2016

I know this is old but I think the other answer has it the wrong way around. Think of it this way - if you are upstream from something what you do can affect it and equally something upstream from you affects you but something downstream can't.

So to use the same method, given a system S:

Upstream - something which S depends on (as it's actions "flow down" to S)

Downstream - something which depends on S (as S's actions "flow down" to it)

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