Numerous fast-growing coastal cities in the Global South are exposed to coastal, fluvial and pluvial floods, as a consequence of decades-long rapid urbanisation and weak enforcement of planning regulations. Integrating Blue–Green Infrastructure (BGI) concepts into the development of the urban landscape has the potential to increase flood resilience and offer broader environmental benefits. BGI is an innovative approach that combines water management and green infrastructure to maintain natural water cycles and enhance environmental and urban renewal. This paper identifies socio-economic, cultural and political challenges influencing BGI adoption in Semarang city in Indonesia. Data was collected from residents of three communities through interviews (n=30), questionnaires (n=180) and focus groups with policymakers and community representatives. The combined quantitative and qualitative data provide an understanding of the specific socio-economic, cultural and political issues at play and reveal flood experience as well as perceptions of community members regarding flood management. Challenges are presented from the point of view of residents and local policymakers and are based on a framework for facilitating local BGI adoption, setting the principles of “inclusive”, “appropriate” and “proactive” as pre-conditions for enhancing community resilience to flooding.

Construction supply chains encompass the flows of materials, labour, information, plant, equipment and temporary works that originate from a variety of different parties. The impact of various supply chain management practices on project performance has been measured, through a combination of a survey and the development of simulation models. Preliminary investigations were carried out by visiting two medium‐sized building projects regularly over a period of six months to gain an understanding of the ways in which delays on supply chains impact on project performance. This was followed by the main survey which was designed to collect data required for developing the simulation models. These models were developed using Pertmaster Risk Expert™ software and incorporated supply chain delays applied to a CPM network of a typical medium‐sized building project of 300 days’ duration. The results of the simulation showed that the project’s median delay was 67 days (22% of the project duration). The use of subcontractors in the project reduced this delay by approximately 45%. It was also learned that delays in material flow caused the biggest impact on the project, followed by labour flow, information flow and ‘plant, equipment and temporary work’ flow. These findings are an important measure of how much supply chain delays impact on project performance.Supply chain management, supply chain delays, project performance, simulation, risk,

The development of information technology continues to evolve to respond the increasing demand and challenges in the construction industry. Building Information Modelling (BIM) emerges in recent years as the fresh solution to make the project lifecycle more efficient by encouraging collaborative working of all stakeholders involved in the construction project, i.e. owners, consultants, and contractors. This study aims to investigate BIM adoption and implementation in Indonesia construction industry and explore challenges and opportunities related to the implementation of BIM. A combination of qualitative and quantitative research method has been adopted for this exploratory research. Data was collected through interviews and questionnaires survey with snowball sampling from twenty entities, consisting of 12 contractors, 4 consultants, and 4 owners. The results show that 60% of respondents have already acknowledged and implemented BIM. The examples of BIM software used by the respondents include Revit, Tekla, and SmartPlan®. Benefits of BIM implementation as perceived by most respondents, e.g. design collision detection, clear project simulation, reduced reworks, and efficient use of resources. The adoption of BIM, however, still faces challenges, such as the absence of requirement and demand, and high investment cost. This research provides an initial understanding of current BIM adoption in Indonesia, which can be used as the basis to develop a national strategic framework for BIM adoption in Indonesia construction industry.

High rainfall leads to flood vulnerability and potentially leads to the failure of road pavement which affects the economic loss for the people. However, such road pavement failures need to be studied more deeply to be able to distinguish whether the failure is solely due to flood natural disaster or other factors, such as overloading and poor construction quality. This research is urgently needed because up to now there is no tool for assessing pavement failure as a tool of decision-making system that is able to distinguish road pavement failure causal factors into category of natural disaster or human negligence factors in accordance with the definition of building failure in Indonesia Law no. 2 year 2017. Assessment of the causal factor of failure is very important because it is closely related to the determination of the parties who must be legally responsible. This research intends to develop methods for assessing the damage and failure of pavement as a tool of rapid and accurate decision-making system to determine the factors of pavement failure. To obtain accurate results, a case study was taken on Kendal Timur road to enable a deep evaluation of the factors that causing failure on the road. The results showed that many factors involved in causing the failure of the road, such as un-functional drainage channel, uncontrolled overload due to the closing of weigh stations around the road, and also low quality of road maintenance work so that repeating similar road damages occurred in the not-too-distant future. Based on functional and structural failure analysis, as much as 71%, 10% and 19% of the road were in failed, critical and not-failed conditions, respectively.

ABSTRAKSektor konstruksi diketahui memberikan dampak cukup besar bagi lingkungan. Sektor konstruksi berkontribusi menghasilkan emisi gas karbon lebih dari 40%, menggunakan material dari alam yang jumlahnya cukup besar, menyumbangkan limbah, serta mengurangi daerah untuk resapan air dan area hijau. Atas dasar inilah dalam kerangka pembangunan berkelanjutan, para praktisi di dunia konstruksi terus didorong untuk menerapkan konsep green building. Saat ini keberadaan green building di Indonesia masih sangat sedikit, sehingga konsep dan pemahaman konsep green building di Indonesia masih harus terus disosialisasikan dan didorong penerapannya. Penelitian ini bermaksud mengeksplorasi penerapan konsep green building pada gedung Bank Indonesia (BI) Surakarta. Tujuannya adalah untuk mengidentifikasi latar belakang dan proses penerapan konsep green building pada gedung tersebut, serta mengetahui pandangan dan peran dari dari pihak-pihak yang terlibat dalam proses perencanaan, pembangunan serta penggunaannya. Metode penelitian dilakukan dengan pendekatan kombinasi metode kuantitatif dan kualitatif dari owner, konsultan perencana, kontraktor dan pengguna gedung. Untuk memastikan kualitas data yang dikumpulkan, dilakukan triangulasi teknik pengumpulan data meliputi observasi, wawancara mendalam, kuesioner dan studi dokumentasi. Penentuan sampel sumber data dilakukan secara purposive. Analisis data kualitatif dilakukan melalui proses data reduction, data display, dan verification. Hasil penelitian menunjukkan komitmen yang kuat dari owner sebagai pioneer dalam mewujudkan bangunan yang ramah lingkungan dan hemat energi sebagai alasan utama penerapan konsep green building pada Gedung BI Surakarta. Aplikasi green building yang diterapkan meliputi: penggunaan solar panel sebagai sumber energi alternatif, penggunaan kaca low-e sebagai pencahayaan alami, memanfatkan air limbah untuk di daur ulang, ruang terbuka hijau yang maksimal, adanya reflecting pool, penggunaan peralatan mekanikal-elektrikal yang hemat energi, terdapat parkir sepeda dan shower compartement, terdapat BAS (Building Automation System), perlengkapan sanitary yang ramah lingkungan, serta lingkungan kerja yang sehat dan nyaman. Owner, kontraktor dan pengguna gedung memiliki persepsi positif dan peran serta yang cukup besar dalam mewujudkan green building. Meskipun kontraktor memiliki persepsi yang positif namun dalam proses konstruksi terdapat beberapa hal yang dirasakan menjadi beban kontraktor antara lain proses konstruksi dan proses administrasi yang lebih rumit, serta timbulnya biaya-biaya ekstra yang harus ditanggung kontraktor. Pemerintah diharapkan dapat memberikan berbagai insentif yang mendorong penerapan konsep green building.Kata kunci: green building, gedung Bank Indonesia, Surakarta PENDAHULUANPembangunan sangat berpengaruh terhadap kelestarian dan kualitas lingkungan karena menggunakan berbagai jenis sumber daya alam. Eksploitasi sumber daya alam yang tidak memperhatikan kemampuan dan daya dukung lingkungan dapat mengakibatkan merosotnya kualitas lingkun...

Precast concrete has typically long lead time, starting from order placement, production stage, to delivery to project site, all of which requires good supply chain management. As a consequence, the risks of its supply chains are inevitable and must be anticipated to ensure the success of a project. The aim of this research is to assess the risks of the supply chain of precast concrete from production to delivery to projects. WKB, a government-owned company that produces precast concrete, has been used as the case study. Activities along the supply chain were mapped based on five dimensions of Supply Chain Operation Reference (SCOR), i.e. Plan – Source – Make – Deliver – Return, upon which risks were identified. Data was collected through in-depth interview and questionnaire survey to key persons of WKB. A 1-5 Likert scale was used to quantify the occurrence and severity of risks along the supply chain. The identified risks were classified into four levels based on the multiplication of the occurrence and the severity, i.e. critical, major, moderate, and minor. A total of nine critical risks were found along the supply chain, i.e. sales forecast and planning for production (Plan); production capacity of natural material vendors (Source); sudden change of production, shortage of skilled workers, additional cost for land stockyard rental, and renewal for industrial land lease license (Make); risk of non-standard transportation (Deliver); defective and failed products (Return). This research provides a valuable understanding of the risks of the precast concrete supply chain and the mitigation strategies.

While the need for water supply infrastructure development keeps increasing, many local governments of Indonesia are facing problems related to limited funding. This condition opens up an opportunity for private sector to invest in water supply infrastructure projects through Public Private Partnership (PPP) scheme. As this scheme is relatively new for many local governments in Indonesia, its complexity and typically long duration of the concession period may raise concerns of potential risks throughout the project life cycle. It is, therefore, very important for public sector as owner of the project to understand and to be able to manage risks properly throughout the concession period. The aim of this research is to evaluate risk management of West Semarang Water Supply PPP Project as perceived by public sector. The objectives are to identify, to analyze, and to allocate risks to the right parties. Qualitative and quantitative approaches have been used for the research method. Data were collected through focus group discussion involving 16 relevant officials of local government of Semarang, including its Regional Water Supply Company (PDAM). This research has identified a total of 66 risks as perceived by the public sector, which are then classified into 11 categories, e.g. political, operation, revenue, etc. The proportions of the level of risks are relatively balanced, as follows; low (37.88%), moderate (28.79%) and high (33.33%). In terms of risk allocation, 46.97% of risks are allocated to the public sector, while 37.88% and 15.15% of the risks are allocated to the private sector and shared by both parties, respectively. The results of this research are valuable for the local government of Semarang and can be used as a guidance in managing risks of the PPP project throughout the concession period.

More than 80% of oil and gas projects around the world experience delays, which may result in huge financial implications to the contractors and the owners. Therefore, it is important to manage delay risks factors to meet the target of project completion dates. The purpose of this study was to map delay risk factors of Engineering, Procurement, Construction (EPC) projects using a case study of a platform and subsea pipeline of an oil and gas project. Data was collected through observations and analysis of project documents, and interviews with respondents in managerial and engineer levels. A total of 28 delay risk factors was identified and quantified in terms of their probabilities and impacts. This research found 1 extreme risk (4%), 15 high risks (54%), 11 medium risks (39%) and 1 low risk (4%). The top five risk factors include, i.e. contractor’s financial capability, delay in delivery of long-lead items, changes in the project scopes, delay of detailed engineering design (DED), lack of experience of contractors. These findings are beneficial for contractors and owners of oil and gas projects to understand delay risks better and to formulate risk mitigation strategies properly.