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...Nutritional surveillance keeping watch over activities and events that are expected to have a direct or indirect effect on status in order detect at an early stage those could precipitate the occurrence of malnutrition population so appropriate measures can be taken functions monitoring implies routine collection evaluation with as wide coverage possible measurements reflect changes detected soon after they occur action if necessary detection trends is concerned change time used planning long term policies programmes information from systems periodic surveys prediction forecasting probable deterioration enough for corrective useful data weather food production epidemic diseases purchasing power etc carried out by regular indicate present future indicators must sensitive abnormal yet should not create false alarms cut off values trigger levels important value critical limit boundary acceptability level proportion below considered large initiate...