Organizations are concerned with integrating diverse systems to facilitate communication between internal systems and external partners. There are three main types of business systems integration: B2B integration for partner communication, enterprise application integration for internal systems, and application to application integration. Successful integration requires understanding business processes to ensure systems support key workflows and objectives. It also requires realistic cost planning to account for hardware, software, implementation expenses, and ongoing maintenance. Finally, project success relies more on effective organizational change management and training than on technical components alone, and thorough evaluation is needed throughout a project to ensure goals are met on schedule and budget.