Business Central - Purchase order


I can not find the option, Production and purchasing proposal in Dynamics 365 Business Central. I am using a Premium license.

I am used to NAV where i can find it.

Is there anybody who can help me with this?

where was it in NAV screen?

Which version of NAV was it? It is not a standard function/report that I have heard about in NAV, so it may either have been a customization or add-on.