The sustainable development requires the provision of adequate infrastructure, but the construction activities on infrastructure development itself still have been considered as a sector that has a negative impact to the environment. The implementation of the sustainable construction becomes a necessity, but the implementation of the sustainable construction in developing countries is still very limited, since there are still many factors that inhibit the implementation of this concept. This study aims to analyse the barriers in the implementation of sustainable construction in the infrastructure development projects in Palembang, Indonesia. The barriers are identified based on the results of literature studies. The survey using a questionnaire was conducted to state-owned and private companies that were carrying out infrastructure development projects in Palembang and its surrounding areas. The survey confirms the various barriers that may occur based on the perceptions of respondents representing state-owned and private companies. The mean item score was used to determine the ranking of each barrier. This study indicate that the following factors are the main barriers to the implementation of sustainable construction, namely factors related to the limited number of trained and/or certified workers and lack of communication between parties involved in the project.

Problems in municipal and domestic wastewater have become major issues in sanitation sectors. One of the solutions to overcome domestic sewage is to install the Wastewater Treatment Plant (WWTP). Economic analysis is fundamentally required for its viability. This paper focused on the economic analysis of feasible rates determination based on the ability to pay (ATP) and willingness to pay (WTP) of users. Furthermore, this paper also highlighted the sensitivity of NPV for different scenarios using different discount rates. Field questionnaires were distributed to surrounding communities in the study area. It was found that the values of ATP and WTP were IDR 125,000 and 40,000 respectively. Using the higher values of ATP, the NPV, and BCR were found to be economically feasible. For the sensitivity analysis, the results showed positive NPV using interest rates of 7.75-9.25%, and negative NPV for discount rates up to 9.75%. Therefore, to implement the development of WWTP, subsidies from the local government may help the starting point of the wastewater treatment plans construction and its operation and maintenance costs.

Pembangunan infrastruktur jalan tol merupakan salah satu jenis proyek konstruksi yang memiliki lingkup pekerjaan yang kompleks, durasi pelaksanaan pekerjaan yang lama, dan membutuhkan biaya yang signifikan. Dibutuhkan teknik pengendalian kinerja proyek yang bersifat konsisten dan terintegrasi agar kinerja proyek tidak berada di bawah kinerja yang direncanakan. Konsep earned value merupakan salah satu metode yang tepat digunakan untuk kepentingan pengendalian kinerja proyek. Penelitian ini bertujuan untuk menerapkan konsep earned value pada proyek pembangunan ruas jalan tol Kayuagung-Palembang-Betung (Kapalbetung) yang merupakan bagian dari rencana pembangunan jaringan jalan tol Trans Sumatera. Pengendalian kinerja proyek menggunakan earned value dilakukan pada awal proyek hingga akhir bulan ke-15 pelaksanaan proyek. Hasil penelitian ini menunjukkan bahwa hingga akhir bulan ke-15, pelaksanaan proyek menghasilkan kinerja biaya yang baik, ditandai dengan nilai CPI sebesar 1,10, namun kinerja jadwal proyek kurang baik sebagaimana ditandai dengan nilai SPI sebesar 0.97. Jika proyek terus dilaksanakan sesuai dengan kinerja yang ada, maka biaya akhir proyek dapat mencapai efisiensi sebesar 8.9% dari biaya yang direncanakan namun proyek mengalami keterlambatan sebesar 5.8% dari jadwal rencana. Penelitian ini menunjukkan bahwa penerapan konsep earned value pada proyek studi kasus dapat memberikan gambaran mengenai status kinerja proyek secara komprehensif.

Worker productivity is an important part of the successful development of human resources and infrastructure building. One of the ways to improve workers’ productivity is using training and worker certification. Therefore, there is a need to analyze the effects of training and certification on worker productivity with case study lightweight brick and steel rods workers in some projects in Palembang. This study aims to analyze the productivity value of workers between certified trained workers (TS) and untrained noncertified workers (BTBS) in the field. Furthermore, comparisons were also conducted on productivity based on field survey and Indonesian National Standard (SNI). This paper also analyzed the significant factors that affect workers productivity in the field. This productivity appraisal used field observation methods and questionnaire. From the results of the study, it was concluded that the training and certification of the workforce greatly affected the worker’s productivity; but some of workers’ productivity of trained workers (TS) and untrained noncertified (BTBS) met the standards of SNI, some did not. This was due to the influence of other factors beyond training and certification of the productivity value of handyman. Furthermore, based on t test results, the factors that significantly affect the productivity of workers were the skills of labor (X1), work motivation (X2) and management (X4). Thus the available regression equation was Y =0,024 +0,332 X1 + 0,676X2 -  0,039X4 + e.

National road preservation activities in Indonesia are usually carried out using a traditional approach system, namely in-house system and contract system with a design-bid-build (DBB) approach. An alternative contract method to improve the quality of roads is the long segment contract. Its definition is carrying out road preservation activities in one continuous segment with the aim to obtain good road conditions for all segments. This study aims to compare the performance under traditional approaches and long segment contracts. Road performance is expressed in functional performance terminology and uses the International roughness index (IRI) indicator. The research was conducted on the outer urban road of Palembang - Indralaya intersection - Meranjat which is part of the national road section in the Province of South Sumatra, Indonesia. Results showed that the road performance contracted with traditional approaches was better than that of long segment ones. This was not expected and was probably due to the lack of understanding of the parties involved in the long segment contract to the principles of fulfilling road service performance. The contractors are not interested in carrying out routine road maintenance projects because the value of the work is small and there is a lack of experience regarding routine maintenance.