The secret to successfully implementing an ERP system is to divide the project into stages. Gradual implementation increases acceptance by users and allows the company to better adapt the solution to its needs. You must plan a breakdown of scope and give users time to adapt. This approach implies more flexible management based on cost/benefit analysis and process optimization.
Project interdependence can substantially increase the duration and cost of a project. The main pitfalls are competition for resources (human and material) and project overlaps during the integration phase. The project manager must be able to detect during the preliminary analysis the potential for conflict and constantly monitor what is happening in other projects.