If your projects are time consuming, how can you effectively use time? Or what must be reduced?

Proper awareness and exposure of critical condition to employees.

Introducing weekly incentive plans can also help a lot.

A project's time is a by-product of the approved project plan. I suggest that use the planning tool to minimize the time as much as you can while maintian achieving the project's goals within time and within budget.

I also suggest considering splitting big projects into smaller ones to better manage them.