An ERP or Enterprise Resource Planning software is comprised of several different enterprise resource planning software applications that communicate with each other and in turn share a common database. Each application (ERP module) usually focuses on a specific business field. In most ERP systems, there are four components: ERP software, Information Technology Architecture (ITA), Problem Management and Analysis Software, and Business Process Management (BPM). These four elements work together to help provide users with the information they want, when they want it. You can usually combine these elements into one ERP solution.