This chapter provides an overview of conceptual approaches and theoretical foundations for EUIS project management. It discusses six conceptual approaches to systems analysis: organizational communications, functional, decision support, information resource management, quality of work life, and management of computing resources. General systems theory is also covered, defining a system and discussing characteristics like open/closed systems and entropy. Coordination theory and action research are introduced as additional frameworks. The EUIS project management method is outlined as applying these theories through eight steps with deliverables, from defining the project scope to institutionalizing results.