The document discusses pre-project activities that must be completed before a project's zero date, which includes identifying the product/project, obtaining clearances, arranging materials and technology, conducting financial and market analyses, determining capacity, selecting sites and processes, estimating costs, and finalizing implementation schedules and personnel. It also discusses techniques for project management, selection, execution planning, scheduling, monitoring, cost/productivity control, and communications. Social cost-benefit analysis considers total economic and social impacts, externalities, and contribution to GDP, benefits to society, environment, and efficient use of resources to evaluate public projects that may not be as commercially profitable but have social implications.