There are multiple risks posed to the longevity of digital materials and the risk analysis method presented here provides a simple but effective way to assess the current state of your digital collections.This semi-quantitative risk analysis was developed at the British Library (BL) and its application to the BL digital collections is used as a case study.
Deborah Woodyard, "Risk Analysis of Digital Library Material" in Proc. IS&T Archiving 2005, 2005, pp 215 - 221, https://doi.org/10.2352/issn.2168-3204.2005.2.1.art00046