Survey Analysis Tools for the Chilean Social Observatory // Provides high-level functions to compute estimates (means, proportions, totals, ratios and quantiles) for complex survey designs, with automatic classification of statistical reliability, between-year significance tests and standardised report generation in 'Excel' format (via 'openxlsx'). It was developed for the Social Observatory ('Observatorio Social') of the Chilean Ministry of Social Development and implements its data-quality criteria, but it can be applied to any complex- survey design (for example the Chilean 'CASEN' household survey, included as example data). The reliability criteria follow Division Observatorio Social (2023) https://bidat.gob.cl/details/ficha/dato/manual-para-la- investigacion-casen-2022 and Instituto Nacional de Estadisticas (2020) https://www.ine.gob.cl/inicio/documentos-de- trabajo/documento/fundamentos-del-est%C3%A1ndar-para-la- evaluaci%C3%B3n-de-la-calidad-de-las-estimaciones-en-encuestas- de-hogares; complex-survey estimation methods follow Lumley (2010, ISBN:9780470284308).