Abstract:
Diaphragm Wall (D-Wall) is a retaining wall which is also used for basement floor walls which are part of a lower
structure which contributes 8% of the total cost of high-rise building construction is a job that has a high enough level of
difficulty so that it has the potential to experience cost overrun. According to World Bank data that 63% of 1,778 projects
experienced Over-run Cost Value Engineering (VE) used to produce more efficient and effective costs and time so as to
increase profit and revenue for contractors and owners. Statistical analysis uses the Relative Importance Index (RII)
method to get the ranking of the 10 most influential factors on cost savings including: Location, Picture completeness and
specification, Cost efficiency, Improving function value, Better project value, Mature planning, Hole ground collapse drill,
Low productivity tools, Cost Model and price fluctuations. From the results of the study Analysis of the case study
obtained cost optimization of 18.83%.
