Use of Five Whys in Preventing Construction Incident Recurrence

Antti Leino1 & Sacha Helfenstein2

1Manager for Safety Development, Business Unit Skanska Finland, P.O.BOX 114, FI-00101 Helsinki- Finland, Phone +358 40 866 8551, [email protected]
2Research Coordinator, Agora Center, P.O.Box 35, FIN-40014 University of Jyväskylä , +41 78 787 8564, [email protected]


In 2005 and 2009 Skanska Finland recognized an opportunity to improve its incident prevention through incidence reporting and the use of the Five Whys technique in accident investigation. A two-phase safety programme approach was adopted resulting in augmented safety awareness and engagement, as well as a more appropriate and actionable representation of underlying incident causes through organizational learning. The paper promotes the linking of new concepts to the lean construction discourse, and serves as interesting case about the move towards a zero waste culture for a large organization.


Safety improvement, Incident, Last Planner, Five whys, Resilience, Lean Construction



Leino, A. & Helfenstein, S. 2012. Use of Five Whys in Preventing Construction Incident Recurrence, 20th Annual Conference of the International Group for Lean Construction , -.

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