Voice acting need to be recorded BEFORE animation starts because the voice will give the animators the timing and emotion and expression they need to animate with. So if holding up animation is out of the question due to deadline commitments, then I’d negotiate for vocal recording dates that won’t delay production, or else consider casting new vocal actors.

I find a flux capacitor is useful. It is helpful in managing time clashes. Sometimes I use several at the same time. They can be useful tools for production and scheduling. I would thoroughly recommend.

On a feature film, for the most part, you can't begin animating without the recordings. The voice recording is used to make a cut of the film with story boards. A story reel. The timing of every shot is driven by the story reel. However an animated series has a more difficult issue with scheduling. Yet, a show like south park could actually begin animating every shot and simply tweak the timing when the voice recordings arrive. Or even create mouth positions with an expression to move the moth based on the volume of the voice? And it can be added and timed to the animation any time. Variations of these.

During the pre-production phase, the animatic is the key point where voice actors are booked and have their sessions recorded. - I would establish a clear communication between what days actors are available for recording and also potential future sessions - Deploy a placeholder voices used by AI for references for the VA. That allows more efficient use of time. - Finalise the animatic and adjust any necessary animation sequences beforehand - Lastly, the VA would do their final recording session and complete their part of the animatic