Roll out / Rollout
Different formsRoll out is the verb; rollout is the noun or adjective.
Roll out
Use when
You need the verb meaning introduce or deploy something.
Example
“We will roll out the new case system in phases.”
Rollout
Use when
You need the noun or adjective for the introduction or deployment.
Example
“The rollout plan includes training and support.”
Quick check
rollout the service, during the roll out, roll-out the service
Usage note