Quantification is the process of estimating quantities and costs of health products needed for a specific program over a period of time and determining delivery schedules. It has two parts: forecasting future demand and supply planning to determine procurement quantities, costs, and arrival dates. Quantification is an integral part of pharmaceutical management systems and is needed to calculate order quantities and costs, plan finances, facilitate coordination, estimate storage and emergency needs, and inform manufacturing decisions. Accurate data from logistics and health management information systems and adherence to standard treatment guidelines are prerequisites for proper quantification.