The document discusses cost-benefit analysis (CBA) as a tool for evaluating the economic feasibility and viability of projects by comparing their costs and benefits. It outlines the steps involved in conducting a CBA, including specifying the project, quantifying inputs and outputs, estimating social costs and benefits, and comparing them to determine net benefits. Additionally, it highlights the importance of CBA in making informed decisions for both governmental and organizational projects, while also addressing potential costs related to pollution and welfare impacts.