Here is a 'crazy' idea: Skim some of the source code of an open source ERP package like Odoo, depth first, breadth first, or a combination of both, module by m

Here is a 'crazy' idea: Skim some of the source code of an open source ERP package like Odoo, depth first, breadth first, or a combination of both, module by module. And here, by modules, I mean ERP modules, like sales, purchase, inventory, etc., not Python modules, although Odoo is written in Python, so it has Python modules too, in the source code. Due to Python, the code is relatively high level, so somewhat easy to read. Of course you need to have a reading level knowledge of Python, but, you know, 'executable pseudocode'. ;) Odoo is supposed to be popular and to have a good number of vendors and other things in its ecosystem. Disclaimer: I have only read these points, not verified them for myself. (But I do have some background in the manufacturing software domain, and in Python, both, hands on, for non-trivial periods.) This is what I would do if I had your goal, apart from things that others have suggested, such as reading books about manufacturing and ERP. Be warned: manufacturing is a huge domain.