Demand management is the process of ensuring customer demand and a company's capabilities are aligned. It involves capturing all work proposals in one system, guiding proposals through governance, helping customers approve proposals, and tracking approved projects. The goal is to enable customers to propose, prioritize, select, and track projects while streamlining approval processes. Demand management is based on forecasting future demand and planning production to meet those forecasts, as manufacturing managers are responsible for production planning but not forecast accuracy. The key benefits are control over product availability, confidence for sales, smoother introductions, flexibility to change, and using a single set of demand numbers.