Purpose: The objectives of this study are to elaborate on the concepts, dimensions and elements of green supply chain management (GSCM) and develop a framework of GSCM implementation for the construction industryDesign/methodology/approach: This paper presents the findings from a study where experts were asked to contribute their opinions related to GSCM in the construction industry. To develop the model, the Delphi method was used. The objective of this method is to achieve the most reliable consensus in a group of expertsFindings: The research result is a developed framework for GSCM in the construction industry comprising five concepts, 22 dimensions, and 82 elements.Research limitations/implications: The limitation of this research is that its output was the discovered elements, but it did not cover the implementation of this model in construction projects, so some elements may be missing.Practical implications: The output of the research could give new perspective to manage the construction project based on Green Supply Chain Method.Social implications: The stakeholder of the construction project has to learn with this concept (Green Supply Chain) in order to improve construction’s project performance.Originality/value: The originality of this research is that it is a new theme in the area of the construction supply chain. Previous research merely considered the concept of GSCM in construction. Therefore, this research develops an assessment model for performance indicators of GSCM implementation in construction projects.

Mesin reng digunakan untuk memproduksi atap baja ringan jenis reng V belum sepenuhnya bekerja secara efektif. Hal ini ditunjukkan dengan adanya downtime, penurunan kecepatan produksi mesin, dan produk-produk yang tidak sesuai standard yang telah ditetapkan. Penelitian ini bertujuan untuk mengukur dan mengetahui tingkat efektivitas mesin reng dengan menggunakan metode Overall Equipment Effectiveness (OEE), mengidentifikasi faktor penyebab six big losses dengan menggunakan Fault Tree Analysis (FTA), dan memberikan usulan perbaikan untuk meningkatkan tingkat efektivitas mesin. Dari hasil penelitian,  OEE mesin reng mencapai rata-rata 57,55%, dan masih berada di bawah nilai OEE ideal (85%). Usulan perbaikan yang direkomendasikan meliputi eliminasi six big losses, mengembangkan program pemeliharaan, dan memberikan pelatihan untuk meningkatkan kemampuan maintenance dan operasional. Abstract The reng machine, which is used to produce lightweight steel roof with a kind V reng, has not fully worked effectively. This is indicated by the presence of downtime, speed losses, and produce products that are not according to standards that have been determined. This study aims to measure and determine the level of effectiveness of reng machine using Overall Equipment Effectiveness (OEE) method, identify factors that cause six big losses by using Fault Tree Analysis (FTA), and proposes improvements to increase the effectiveness of the machine. The result of research, OEE of reng machine reached an average of 57.55%, and still was below the ideal OEE (85%). Proposed improvements that recommended include the elimination of six big losses, develop a maintenance program, and provide training to improve the ability of maintenance and operations.

While the performance evaluation of reverse logistics (RL) practices in the construction sector is crucial, it is seemingly limited compared to that in the manufacturing sector. As the project life cycle in the construction sector is typically long, effective coordination among the stakeholders is needed to integrate RL into each phase of the project life cycle. This paper proposes a new model of RL for the construction industry, incorporating the dimensions, elements, and, most importantly, indicators needed for the evaluation of RL performance. The model was initially derived from the extant literature. It was then refined through (1) focus group discussion, by which suggestions pertinent to the proposed model were collated from academics and practitioners, and (2) judgments by academics and practitioners to validate the model. The validated model includes 21 indicators to measure RL performance, spanned throughout the green initiation, green design, green material management, green construction, and green operation and maintenance phases. The paper offers a new method for how RL can be adopted in the construction industry by proposing an innovative model that will benefit stakeholders in the construction industry.

No abstract

Although the humanitarian logistics coordination model in Indonesia is fairly effective, the role of each player remains unclear. For example, some of the activities that are sufficient to be done by one agency are in fact done by other institutions as well. This has resulted in inefficiency and ineffectiveness regarding on the handling of disaster relief goods. Therefore, it is essential to determine the role of each stakeholder involved in the management of natural disasters in order to improve the model. This study was conducted to provide the proposed model of humanitarian logistics coordination for developing the framework of coordination between stakeholders in the management of natural disasters, with the involvement of logistics players through the RASIC Chart method. and volunteers. The model of collaboration and coordination between the stakeholders still has some drawbacks, such as emergency responses that do not involve those who are competent in the field of logistics.This study was conducted to provide the proposed model of humanitarian logistics coordination for developing the framework of coordination between stakeholders in the management of natural disasters, with the involvement of logistics players. This framework is expected to be a reference in establishing the involvement of stakeholders and the roles of each party to improve the effectiveness and efficiency of the management of natural disasters. In this paper, deductive methods are used to map stakeholders which are tied to disaster management and clarified through the RASIC Chart. Research MethodA RASIC Chart will be used in this research. It has functions for recognizing the rules and competences of each humanitarian logistics stakeholder in Indonesia in a process that ensures that ownership, approval, support, consultation, and communication responsibilities are assigned [6]. The advantages of a RASIC chart is ensuring an obvious relationship between activities and resources, emphasizing distinct competences for every resource, and providing suggestions for communication planning [7]. Responsible represents the stakeholders who are responsible for accomplishing the activity, while approves represents the stakeholders who have authority to take an action. Support means the stakeholders who offer resources. Stakeholders who have to know the outcome of the implementation of the activities are referred to as informed. Finally, consulted refers to stakeholders who adopt the implementation suggestions indirectly [8]. A RASIC chart will ensure stakeholders that are required to know do indeed know and stakeholders who are not required to know will not [9]. Data are compiled by interviewing and surveys about coordination among the

The construction industry plays a significant role in improving the quality of the built environment, but its activities also impact the wider environment. Supply chain management (SCM) aims to increase the efficiency of the construction process through improvements in the quality, cost, and time frame of projects. Green SCM has as its purpose reducing environmental impact by opting for eco-friendly materials starting from the design phase in the choice and procurement of materials to be used in construction projects. This study aims to adopt GSCM concepts of the manufacturing industry for application in the construction industry. A literature review was conducted to learn from previous research about the implementation of GSCM in manufacturing to serve as a basis for adopting of this concept for the purposes of building criteria for the implementation of GSCM in the construction industry.

This study aims to develop low-cost and environmentally friendly material galvanic-based dissolved oxygen sensors. A Dissolved oxygen (DO) sensor has been designed and fabricated on an 85 x 205 mm galvanic-based. The sensor structure device consists of Al-Zn reference layer electrode, Ag/AgCl active electrode, 120ml KCl electrolyte solvent 0,1 M, and closed by TiO2 membrane (PTFE). The Al-Zn formation reference electrode was done by Ag layer chlorination using FeCl3, and the TiO2 membrane was formed by TiO2 paste screen printing. The test was done to measure the sensor’s performance based on the current-voltage characteristics between 1.0 and 1.8 V. The results showed that a stable diffusion current was obtained when the input voltage was 1.5 V, resulting in the best sensor performance with a sensitivity of 0.7866 μA L/mg and a stable step response time of 3 mins. This prototype sensor showed high potential for prototyping for a low-cost water quality monitoring system.

PT Adhi Perkasa Gedung is a construction company engaged in building construction that is a subsidiary of PT Adhi Karya (Persero). Sustainability has become a significant issue this decade, as well as construction projects. Construction companies are required to be able to manage their resources effectively and efficiently through the completion of environmentally friendly projects. PT Adhi Perkasa Gedung as the construction contractor for the Cordova Apartment, strives to minimize waste in light brick installation. The light brick is used as a bulkhead between rooms in the apartment. The problems that occur are the waiting time of light brick procurement, product defects, material handling, and installation process errors. The purpose of this study is to minimize waste in light brick installation using lean construction and six sigma methods. The results of this study indicate the existence of rework due to installation process errors, material quality.