To increase rapidly to a new value.
Headcount ramped up over three months.
To increase (something) rapidly to a new value; to cause (something) to ramp up.
The manager ramped up headcount.
To start up; to be in an initial phase of rapid increase.
The 5G development project will ramp up in the first quarter.
To start (something) up; to cause (something) to ramp up.
He wants to be first to ramp up his project.