Operation Timbang (OPT) Plus is the annual weighing and height measurement of all preschoolers 0-71 months old or below six years old in a community to identify and locate the malnourished children. Data generated through OPT Plus are used for local nutrition action planning, particularly in quantifying the number of malnourished and identifying who will be given priority interventions in the community. Moreover, results of OPT Plus provide information on the nutritional status of the preschoolers and the community in general, thus, providing information on the effectiveness of the local nutrition program.

The 2017 Philippines National Demographic and Health Survey (NDHS) was designed to provide data for monitoring the population and health situation in the Philippines.The survey is designed to provide indicators on fertility, fertility preferences, family planning practice, childhood mortality, maternal and child health, knowledge and attitude regarding HIV/AIDS, and violence against women. These indicators are crucial in policy making, program planning, and monitoring and evaluation of population and health programs, including those anchored on the attainment of related Sustainable Development Goals (SDGs). The NDHS 2017 is the sixth DHS survey to be conducted in the Philippines in collaboration with the worldwide Demographic and Health Surveys Program, and the 11th national DHS in all. Fieldwork for the survey was carried out from 14 August to 27 October 2017 covering a national sample of over 31,000 households and more than 25,000 women aged 15 to 49 years.