A glimpse of horizontal directional drilling productivity factors

摘要: Horizontal Directional Drilling (HDD) is a trenchless technology provides an installation alternative that offers lot of benefit compared to traditional open-cut method. It’s called HDD because its steering ability avoid existing utilities or other obstacles either horizontally, vertically and even pulled back where she got name. was developed in California the 1970s introduced Europe 1986. Since year 1992 up 2016 there are about 40 thousand unit machine were sold worldwide. Contractors, consultants, municipalities decision makers always difficulties determine cost duration required when using method due presence many qualitative factors. Understanding productivity factors will assist stakeholders overcome this matter. The aims study identify factors, affect productivity, current tools used by researcher, open problems areas related for improvement. Systematic Literature Review (SLR) carried previous papers retrieved manual search, critically analysed discussed. Researches regarding conducted researchers studies involved journal articles, conference papers, books, guidelines etc. Consequently, these experiences models can contractors, preparing their costing scheduling. lacking on highlighted suggested futre studies.