This document presents a comprehensive student assignment focused on project cost management within the context of a BSB51415 Diploma in Project Management. The assignment is based on the IndoAust Jaya (IAJ) Case Study. The student addresses various aspects of project cost management, including outlining resource requirements and their associated costs, preparing a detailed project budget, and developing a cost management plan that encompasses monitoring, reporting, and change management processes. The student also demonstrates stakeholder consultation by preparing an email, formulating meeting questions, and describing their communication style. Furthermore, the assignment involves calculating schedule and cost variances to assess project performance. The student's work provides practical insights into the core principles and practices of managing project costs effectively, using a case study approach to simulate real-world project scenarios.