The Master Production Schedule menu has been relocated under a new MPS submenu within the main Planning menu. This makes production planning tools easier to find and groups related planning options more logically for manufacturing users.

Task : https://www.odoo.com/web#id=30259&view_type=form&model=project.task&action=333&active_id=131&menu_id=4720

Pad : https://pad.odoo.com/p/r.263da2a04e46fa2e27871dc075dabc98