Project System (PS) is one of the key modules of SAP to perform project and portfolio management. It helps you to manage the project life cycle starting from structuring to planning, execution, until the project completion.
SAP PS helps to manage and support all the SAP projects in a company. Project System is a source to organization for planning, scheduling, collecting, and generating revenue and expenditure over a project period.
There are no set prerequisites to learning SAP PS, but it will help if the reader has a background in the business area that this module covers.