Application of demographic methods in population planning

Demographic methods provide an invaluable foundation for population program planning by giving quantitative expression to present and future characteristics of a population. It must be recognized that, while the formulas may be precise, the validity of the outputs are constrained by the quality of input data available and the assumptions required. Fertility projections present special problems because of the multiplicity of factors that can independently influence reproductive performance. The estimation of births averted by family planning programs is particularly tenuous. Population planners must be cognizant of all the dimensions of population change if effective programs are to be developed.