For SMBs, the choice between MRP and ERP depends largely on the complexity of their operations. If a business primarily needs to manage production schedules, inventory levels, and materials planning, an MRP system might suffice. However, if the business requires a more integrated approach that includes managing financials, customer relationships, and human resources, an ERP system would be more beneficial. Many modern ERP systems offer modular options, allowing SMBs to start with core functionalities and expand as their needs grow.