Project scheduling is the process of defining project activities, sequencing them logically, estimating durations, and developing a timeline that predicts when work will be performed and completed. It sits at the heart of project management, driving resource allocation, cost control, and stakeholder communication. The Critical Path Method (CPM) revolutionized this field by identifying the longest sequence of dependent tasks that determines the minimum project duration—any delay on this path delays the entire project. What makes modern scheduling powerful is not just finding the critical path, but understanding float, dependencies, and variance tracking to dynamically adapt as conditions change, turning static plans into living, decision-ready models.