]project-open[ is an open-source based web project management and PSA (Professional Services Automation) solution for consulting companies focused on the efficient management of internal resources, knowledge management and Internet collaboration. ]pc[ covers the entire project life cycle from sales (CRM-light), staffing, execution (timesheet, incidents and discussions, filestorage, controlling) to invoicing and payment. The ]pc[ architecture is designed for mission-critical applications with high scalability and a sophisticated role-based permissions system.