ERP includes a considerable supply of applications. ERP software includes intrinsic modules as well as modules broke down from MES, INV and TQM. ERP also includes modules such as capacity planning, job costing, CRM (customer portal and management), SRM (vendor portal and management), learning management, continuous improvement management, (knowledge bases/job, product and shift logs), and financials. Other modules available for ERP are the modules applicable to MES.

MES (manufacturing execution systems) serve as the connection between a business system such as ERP and a manufacturer's plant floor. MES is an extreme application of an ERP software system. MES modules that may be offered include production reporting, OEE, downtime reporting, production scheduling, advanced planning, closed loop manufacturing, scrap reporting and job tracking. Modules pertaining to INV are also ERP modules available.

INV (inventory) software systems are for use with warehouse, finished goods, WIP, customer fulfillment or any other transaction based inventory control requirement. These modules available for and ERP system are raw materials inventory and tracking and inventory. TQM is another great application that can be included with an ERP system.

TQM (total quality management) addresses all of the important aspects of quality management and brings them together. TQM modules that may be available for ERP systems are quality data collection (statistical control), preventive maintenance management, calibration, CAPA (corrective and preventive action management), APQP (advanced product quality planning), PPAP (production part approval process), FMEA (failure mode effects and analysis), change management, audit management and document management. Some vendors offer ERP systems that allow you to implement one module at a time and progressively add on further modules as business needs change and progress.