Large-scale projects often face challenges such as budget constraints, time limitations, financing requirements, and difficulties in securing investors. Among the most significant causes of these challenges are inaccurate risk assessment at the contracting stage, inadequate management of changes during project execution, the absence of an integrated management system, and insufficient familiarity among project stakeholders with legal and contractual requirements.One approach to addressing such challenges is the use of well-structured contractual frameworks, such as **NEC, FIDIC, and JCT**, which are widely applied in large-scale projects. In addition to providing an overview of contracts based on internationally recognized project management standards, including **PMBOK and PRINCE2**, this book offers an in-depth examination of the legal and contractual aspects of large-scale projects, including the management of project time, cost, changes, and risks, with a focus on minimizing disputes.