We just installed the MRP module on our development machine. When we tried to make a production order, we had to make a product in a sort of wizard view that popped up on the screen. 

We can't make this product because we made some custom fields available on the normal product form. These fields are not visible on the wizard form that we're getting so we can't add this product. 

Does anyone happen to know what view I need to inherit to add in these fields or know where I should look for this view? I have tried searching but I'm finding it quite difficult to locate the correct view to inherit.

Any help is greatly appreciated.

Kind regards.