As noted in Module 1, few countries have systematic procedures for quantifying drug requirements. This lack is particularly serious in developing countries because of their heavy dependence on imports, the need to plan orders well in advance, and the vital importance of making the best use of limited budgets and scarce foreign exchange.
The most commonly encountered symptoms of poor quantification of drug requirements are briefly described below. Of course these symptoms may be caused by several other deficiencies, but poor quantification is usually one of them and often the most important one.