Production Order and cost center

Hi Gurus,

I have a workcenter and there is no cost center put in it, no costing information maintained for this.

I use this work center in my routing.

Say I create a production order for this material.

What is impact of this production order?

What will happen if there is no cost center in the work center, used in Production Order.

It will stop which activity like?
Will it stop confirmation? Settlement? Doing GR?

Can anyone explain me on this?

Your reply is highly appreciated.

Regards,

Srini