Setup of an ordering process in SAP MM

The customer wants to use SAP MM to create purchase orders. The purchase orders are to be created both manually and automatically via interface. The interface is called via Web services. The corresponding SAP system already exists, but Customizing is to be enhanced for the ordering process. Account assignment should be possible to different objects (cost center, CO internal order and WBS element). The order is created without preceding documents. In addition, the purchase order printout is to be converted using Adobe Forms. For optimization purposes, SAP standard Customizing will be enhanced in several places by developments to enable customers to create purchase orders with just a few clicks. In addition, the order creation is to be set up using an interface and implemented as a web service.