Set pumping schedule?

I work full time and pump 3x a day to provide milk for my 4 month old for daycare the next day. I breastfeed my son before I leave every morning sometime between 4:30-6am, and have been adjusting my pump schedule to just pump 2.5-3 hour increments after that. So it could be 8, 11 and 2pm one day and different the next all depending on when baby feeds before work. Is this an ok way of pumping at work or should I just be sticking to set times?

I’ve been producing enough or more than enough every day, just curious if there is a better way to manage pumping at work.