20th November 2015. the Society of Estonian Conservators organised seminar about the preservation and conservation issues of the different materials and about documentation (“Esemete erinevate materjalide vastastikune kahjustav mõju – säilitamise ja konserveerimise problemaatika.”) in Olustvere. Andres spoke about accuracy, quality, uncertainty and error during the artefact/monument/building documentation (“Täpsus, kvaliteet ja viga. Küsimused dokumenteerimisel”).