Quantification of human errors is generally a baffling work to undertake in any of the industry. With reference to the construction industry, due to scarcity of databases, no widely standard operating procedures until now have been comprehensively adopted. In fact, without methodical database management systems it seems to be quite difficult to quantify the human errors as behavioral aspects of humans are more or less the same in every industry. The main objective of this study is to identify the negligence in construction industry particularly associated with geotechnical engineering in relation to human errors or uncertainties. The concept of human reliability analysis has neither been formally accepted nor thoroughly considered till now despite the consensus that human uncertainty exists. Human reliability analysis proposes different models and methods to pinpoint and quantify human performances as human operations sometime pose big threats to structural reliability. Slope failure is also among the repercussions of flawed design, lapses in construction and poor maintenance of the structures. Among different techniques discussed in this study, this study propounds the model of HEART for human reliability assessment. The reason of selecting HEART model is quite lucid because this model has also been previously tailored by air traffic management and railways. In other words it works well and it has the flexibility to adjust with any other industry.