Final answer:
The integration of project processes to improve Project Management is primarily attributed to the Project Management System, which necessitates a holistic coordination across various project domains, shaped by the organization's environment and culture.
Step-by-step explanation:
The integration of all project processes and practices to improve Project Management is primarily due to a Project Management System. This system encompasses the comprehensive collaboration and synchronization of various project domains to ensure that they function effectively as a unified whole. As evidenced by large engineering projects throughout history, success required not just technical engineering know-how but also a holistic understanding of governmental processes, resource allocation, and labor capabilities. These undertakings exemplify the complexity and interdisciplinary nature of project management, which is critical for the centralization and coordination of project activities.
Moreover, a strong Project Management System is typically influenced by the organization's environment and culture, which determines how projects align with organizational values, norms, and structures. It is this systemic integration and cultural alignment that ensure all aspects of the project are working towards a common goal. Skills in engaging with these dynamics and managing various elements are thus essential for modern project managers.