Subsequent SIAs are assumed to reach the same proportion v of the population (i.e. same coverage), which may either consist of randomly chosen individuals at each round (random coverage) or repeatedly reach the same fixed group of individuals (fixed coverage), meaning there is a persistently “missed” group.
![[This page as RDF]](http://data.gesis.org/somesci/static/rdf-icon.gif){kind=icon}