Cost structure plays a crucial role in determining project viability. Fixed and variable costs behave differently over time, affecting cash flow and funding requirements. Feasibility models that clearly categorize and structure costs help teams understand how expenses evolve throughout the project lifecycle. This understanding supports better pricing, phasing, and financing decisions. By analyzing cost structure in detail, developers can identify opportunities to optimize spending and reduce risk. A clear cost framework strengthens feasibility outcomes and improves financial resilience.