It requires expertise to handle SAP software. SAP is an ERP system. This Enterprise Resource System, ERP or MRP system need much knowledge and effort to be implemented. Every other ERP or MRP systems, such as Microsoft Dynamics or SYSPRO, is equally difficult to be implemented properly, as SAP is.
SAP HANA requires a perfect understanding of the correct methodologies, which are needed for a particular business, where this SAP software is being implemented. One needs to consider the minute details, after asking the related questions, before deploying a solution in SAP software.
Every question that is related with a particular module of business, needs to be translated into the system of ERP or MRP first. This scale of the ERP or the MRP system makes these systems difficult to implement. It is a job of an expert. Any SAP technologist can implement SAP easily and maintain SAP with ease.