My company sells a variety of sweets. By feel, we anticipate some of the stocks guessing an amount that our regular customers will order, and then we finish with small batches if needed after the sale order is confirmed.

On the one hand, if we want to have a Make to Stock route so that we can anticipate that amount, but if we did not anticipate enough, and we are short on stock when the sales order is created, we want to have the rest made by the Make to Order rule. 

The problem is that even if we have that anticipated stock, the MTO rule will create a production order without accounting that stock, hence telling us to produce extra quantity.

How would you mix both rules to work on my case?

Thanks