Background: According to the 2019 Global Competitiveness Index (CGI) by the World Economic Forum, the infrastructure growth of Indonesia is placed on number 72 out of 141 countries and ranked 5th in the ASEAN countries. The growth of infrastructure in Indonesia is a result of the imbalance increase of developments of 10-55% annually with only a 1.9% annual increase in road length. There was a delay of 11.95%, with the high investment in the construction of this toll road and the low-interest rate of return of around 7.79%. Objective: The expected goal in this research is to have cost and time efficiency in implementing infrastructure on the toll road project. Materials and Methods: This research is using a combination of case studies and statistical analysis; the case studies and the implementation of the M-PERT and VE on the object. Statistical analysis using simulation tools Relative Importance Index (RII) analysis based on research instruments to the success of the implementation of Manual Program Evaluation and Review Technique (M-PERT) and Value Engineering (VE) on toll road projects. Conclusion: The results of research with the analysis RII reveals that 10 important factors are affecting the performance of a project. The case study using the M-PERT method obtains a value of time accuracy of 98.87% of the real duration needed on site, while the VE method results in a revenue contribution outside of the toll income of 9.38% of the construction cost.

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Indonesia's ranking is 72 out of 141 countries and is in 5th place in the group of countries in Southeast Asia based on the 2019 Global Competitiveness Index (GCI) by the World Economic Forum. The current development of infrastructure development is not directly proportional to an increase in the number of infrastructure users by 1.9% from an annual increase of 10%-55%. And the occurrence of implementation time experienced a delay of 11.95%. And with a low rate of return on books with high investment costs in the construction of 7.79%. The expected goal in this research is to have cost and time efficiency in implementing infrastructure development. In this study, the focus is on the upper structure work, one of which is the box girder, to improve time and cost efficiency based on the Manual Program Evaluation and Review Technique (M-PERT) and Value Engineering (VE) in the case study of this research. The case study using the M-PERT method resulted in a time efficiency value of 98.87% of the completion time at the job site, while the VE method obtained an added value of income outside toll roads of 9.38% of construction costs.

Background: Of a total of 180 countries in the world, Indonesia is ranked 116th in the EPI ranking. This paper describes the innovative design of a high-rise hotel building that carries a green building concept. which utilizes the outer wall area of the hotel building as an object in this study. Objective: The main design of this project is the creation of an innovative high-rise hotel building with attention to architectural, structural, and lighting system aspects as well as energy efficiency from direct sunlight, which will be processed into a source of electrical energy. Materials and Methods: Application of analysis through value engineering case studies and application of green building methods, with qualitative methods. This paper focuses on factors related to energy sources and environmental sustainability and calculates life cycle costs concerning case study designs. The goal is to reduce the use of electrical energy sources from PLN which have an impact on nature preservation, by carrying out the concept of environmentally friendly buildings, by utilizing the facade wall area with the application of Photovoltaic. Results: The results obtained a percentage of ≤ 6.21%, with the use of Photovoltaic material as much as 100%. Conclusion: The facades (east and west) generate ± 1,050 KVA of electricity from the Solar Power Plant and reduce the use of electricity from PLN by 991 KVA, out of a total of 2,041 KVA. It can be concluded that the decrease obtained is 47.32%.

Indonesia's population is ranked 4th in the world after India and the United States, as well as the global Covid-19 pandemic, Indonesia is also recorded with the most cases of infections and deaths due to Covid-19 in ASEAN, therefore Hospitals in Indonesia has not been able to represent the need for beds and health services. Therefore, the hospital building construction project has become a driven demand for the fulfillment of health services for the Indonesian population. Estimation is one of the causes of the cost overrun. Implementation of Building Information Modeling Quantity take-off (BIM QTO) in hospital structural work can be done if the cost breakdown is ≤ 24%. Statistical analysis by using the Relative Importance Index (RII) has a result in 10 rankings of factors that influence the implementation of BIM QTO, namely drawing, completeness Bill of Quantity (BoQ), TOR & specifications, cost reduction, preparation of activities in the work breakdown structure, cost breakdown, 3D modeling details, Data Interoperability, Quantity Take Off, Subcont & Supplier pricing, and cost database. Study cases with the implementation of BIM QTO on hospital building structures work cost efficiency up to 6.18%.