Hi Maurice:

You get a popup like so when you click on the Produce button. You can set the produced quantity in this popup. In your case, you can set it to 50 on day 1 and then click on Produce again on day 2 for the remaining 50 items.

In my example below, I created an MO for 3 units and processed 2 in the first round and the remaining 1 in the second round.

I don't understand what you mean

What I would like to do is two declare the first 50 produced products on day 1 for example and the second part of the 100 initial products to produce on day 2.

I don't need to use negative produced products

By any chance you get a error alert : The quantity to produce must be positive?