Animate only using Animation without rigging?

Hi community!

I have a doubt about how animated a model 3D, specifically about question of efficiency. I have done a model 3d compound of three objects separated from each other. I have seen that with Animation component from Unity3D I could make the animations that I want, although my doubt is:

Is it efficient animate using to Animation without Rigging?

Thanks and greetings!

Hi.

Rigging is needed to ensure that all parts of Model (Character, Car, Door, …) are interrelated.

If you do not want to binding each object with the other, you do not need to use the rig and in which case you can animate each object individually (Animation Clip for each object).

If all of your objects is a part of a one large object (for example the Robot), and it is necessary that all of these objects are moved interconnected, it is necessary to use a rig.
Or (more difficult, but possible variant) you can binding all separate objects programmatically by a script.