Opinion of others was the alternative mentioned to reduce the majority of biases: anchoring, halo effect,availability related bias, pseudocertainty bias, planning fallacy, sunk cost fallacy and exposure effect.
Although the project manager is responsible for making final project decisions, it shows a concern to consider opinion of others, such as consultants, Project Management Office members, other project managers and the project team itself with the objective of obtaining a better base for their decisions and not depositing all confidence in their own experience.
The most mentioned root causes were related to comfort zone and absence of historical basis.
The difficulty in storing information/data that is systematically organized and that can be retrieved easily is one of the most problems in knowledge management in projects context (Barclay and Osei Bryson, 2010;Pemsel and Wiewiora, 2013).