Technical Programme

345	Applying an Unsupervised Machine Learning Method for Defining Maintenance Significant Items Miguel Angelo de Carvalho Michalski, Arthur Henrique de Andrade Melani, Renan Favarão da Silva and Gilberto Francisco Martha de Souza
444	The Ageing Challenge of Hazardous Installations in Italy: Accidents, Results of Inspections and Good Practices Romualdo Marrazzo and Fabrizio Vazzana
613	Benchmarking and Compliance in the UK Offshore Decommissioning Hazardous Waste Stream Joe Ford, Sean Loughney, Eddie Blanco-Davis, Ava Shahrokhi, June Calder, David Ogilvie and Erik MacEachern
627	Analysis of Failure Rate and Time of Water Pipes Failure Removal Katarzyna Pietrucha-Urbanik and Barbara Tchórzewska-Cie\'slak