Eliminating sources in superposition: one at a time or all at once?

[AchillesWrathfulLove]

do you eliminate an independent current/voltage source one at a time or can you do all of them at once.

Let us say you have 5 independent voltage sources and 5 independent current sources. Do you short circuit 5 of those voltage sources and leave 5 independent current sources or do you have to do it one independent source at a time?

 

[analogdesign]

You have to do it one at a time, meaning only have one independent source operating at a time.