This Project Management Discipline document at the Conceptual Stage comprises three key sections. The initial section delves into project management, encompassing Implementation stage planning, pre-feasibility stage planning, and project integration management. The subsequent section, Capital Estimating, provides detailed insights into Capital Cost Estimating. The final section, Business Case, centres on Operating Cost Estimating, including aspects such as Operating Cost model Development, OPEX Risk and Contingency, and OPEX Cost Escalation. Spanning 15 pages, this document underscores the imperative of identifying needs and opportunities to formulate a Business Case for various mining projects. It represents the culmination of extensive knowledge and expertise garnered over many years by leading industry professionals.