Cost Control is a part of cost management focused on monitoring, comparing actual vs. planned costs, and taking corrective actions. 

Definition of Cost Control Just for Business Humans:

• Cost control is like using the steering wheel and brakes on a road trip: You check where you are (actual costs), compare it to where you planned to be (budget), and make course corrections if you’re going off-track.

It involves:

• Comparing actual vs. planned costs (a.k.a. variance analysis)
• Adjusting scope, timeline, or budget when needed
• Using tools like earned value management, cost forecasts, and change control to stay in control

The goal?

• 
  Avoid surprises, stay on budget, and keep your project from veering off the road.