• Korean Journal of Construction Engineering and Management
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• v.24 no.3
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• pp.20-30
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• 2023

This study was conducted to analyze the degree and characteristics of the improvement of the safety management level of mid-sized construction companies by identifying the current safety management level for domestic mid-sized construction companies and comparing it with the past safety management level. As a result of the study, the current safety management level of domestic mid-sized construction companies by group has improved more than in the past, compared to group 2 and group 1. The current level of safety management is relatively good, with the first and second groups almost similar, and the level of safety management at the headquarters and the site is also similar. Each group of mid-sized construction companies in Korea analyzed measures to improve the safety management level, and proposed measures to improve the safety management level of mid-sized construction companies in Korea.

• Korean Journal of Construction Engineering and Management
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• v.16 no.3
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• pp.165-176
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• 2015

Recently many Korean large-sized construction companies as well as specialty contractors have been expanding their business in the overseas market to mitigate impacts from long-term stagnation in the domestic market. Such as a result, it has been arisen as a major issue that contractors effectively manage the delays which have been commonly faced with in international mega-projects. Therefore it can be said that the ability of the delays management leads a success of project. This paper presents a review of literature for delay analysis methods such as time impact analysis(TIA) and raises practical problems to rationally substantiate the duration of extension of time(EoT) in international mega projects which have wide scope of works as well as complicated and detailed contract baseline programs by taking theoretical approaches. We suggest the two improvement concepts to substantiate the EoT claims which are effectively applicable to practical projects. The first is to sort out dominant delays among numerous delays in advance of applying a delay analysis. The second is to set up the delay sections with the advanced concept for analysing delays' effects by TIA. This study performed a case study on an actual international mega-project. to confirm the effectiveness of improvement concepts that this practical approach is applicable for the assessment of EoT. In conclusion, this paper supposes to provide practitioner in charge for an EoT claim with an advanced substantiation methodogy when they not only analyse the construction delays by using TIA, but also negotiate with stakeholders about with the assessment of EoT.