This document discusses cost management in project management. It defines cost management as the process of planning and controlling a project's budget to predict expenditures and prevent going over budget. It outlines key cost management principles like cash flow analysis, tangible vs intangible costs, direct vs indirect costs, and importance of identifying all project costs, getting approvals before purchases, and keeping costs and financial plans up to date. The document also discusses how cost management is implemented through tools like cost management plans, cost baselines, activity cost estimates, and performance measurements. It provides examples of how project management software like Primavera and MSP can help with cost management functions like budgeting, earned value reporting, and managing expenses.