All systems go
Definition 1 of 1
Pro Tip 1/3Space Launch Origin
This phrase originated from space launches, meaning all parts of a rocket were ready for liftoff. 
Like a space mission, we had an 'all systems go' for our product launch.
Pro Tip 2/3Project Readiness
Used when every part of a project is prepared and it's time to start or proceed. 
The event planning is complete; we’re 'all systems go' for the weekend.
Pro Tip 3/3Positive Assurance
Conveys a sense of confidence and readiness, often before starting something important. 
The team was anxious, but the manager announced it was 'all systems go'.