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"Bandara XYZ merupakan salah satu proyek konstruksi dengan sistem kontrak Design and Build yang pada umumnya dipilih untuk efisiensi dan efektifitas pekerjaan proyek. Namun dalam pelaksanaan dalam proyek Bandara XYZ masih terjadi construction waste yang salah satunya disebabkan oleh banyaknya keterlibatan stakeholder. Penelitian ini telah diidentifikasi kepentingan masing-masing stakeholder internal dan eksternal serta dilakukan survey untuk mengidentifikasi kepentingan dari tiap- tiap stakeholder yang berpengaruh dalam construction waste, dari hasil survey dilakukan identifikasi dan analisis terhadap stakeholder menggunakan software Partial Least Square kemudian disusun strategi dan pengelolaan hubungan termasuk di dalamnya pola komunikasi antara para stakeholder sehingga dapat mengurangi construction waste yang berbasis PMBOK. Berdasarkan hasil penelitian terdapat bahwa stakeholder eksternal sangat mempengaruhi construction waste pada proyek Bandara XYZ.

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XYZ airport is one of the construction project contract system Design and Build are generally chosen for the efficiency and effectiveness of project work. However, in the implementation of the project is on XYZ airport of construction waste and this is due to the many stakeholder involvement. This research has identified the interests of each internal and external stakeholders and conducted a survey to identify the interests of each stakeholder in the construction waste, from a survey conducted stakeholder identification and analysis of the use of software Partial Least Square then organized strategy and managing relationships including in which the pattern of communication among stakeholders so as to reduce construction waste based on PMBOK. Based on the results of the study are that the influence of external stakeholders on the project of construction waste at XYZ airport."

"Keberhasilan melaksanakan proyek konstruksi tepat pada waktunya adalah salah satu tujuan terpenting. Keterlambatan merupakan sesuatu yg tidak dikehendaki, karena akan sangat merugikan kedua belah pihak. Beberapa proyek yang kompleks terdapat banyak faktor ketidakpastian sering menimbulkan limbah (waste) yang menyebabkan proyek terlambat. Salah satu metode untuk menanganinya adalah konsep lean construction. Studi di proyek Pekanbaru Dumai Seksi 2A pada underpass 28+150 terdapat 15 dari 58 kegiatan yang memyebabkan keterlambatan 30 hari, dimana jika menghilangkan kegiatan tersebut masih terlambat 15 hari. Salah satu upaya memperpendek durasi adalah crashing program dengan penambahan tenaga kerja sebanyak 115 orang selama 47,5 hari pada pekerjaan bekisting dan pembesian. Tools lean lainnya yang dapat dilakukan adalah standardization, last planner system, coordination, get quality right at first time, just-in-time, prefabricated dan five S. Dengan crashing program, waktu pekerjaan menjadi 145,5 hari kalender dimana lebih cepat 4,5 hari dari schedule rencana. Biaya mengalami kenaikan sebesar Rp 625.941.000,-, namun disisi lain terdapat efisiensi waktu selama 4,5 hari sebesar Rp 62.907.368 sehingga berpengaruh terhadap HPP dari 82,166% menjadi 86,311% dan laba mengalami penurunan dari 17,878% menjadi 13,689%. Dampak lainnya adalah tidak kena sanki 1/1000 dan terhindar blacklist dari Owner.

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The success of implementing a construction project in the end is one of the most important goals. Delay is something that is not desirable, because it will be very detrimental to both parties. Some projects are one of the most important factors that cause waste to emerge. One method to handle it is the lean construction concept. The study in the Pekanbaru Dumai Section 2A project on the 28 + 150 underpass was 15 of the 58 activities which caused a delay of 30 days, whereas if the activity was eliminated it was still 15 days late.

One effort to shorten the duration is a strike program with a workforce of 115 people for 47.5 days on formwork and pembesian work. Other lean tools that can be done are standardization, the last planning system, coordination, getting the right quality at the first time, on time, prefabricated material, and five S. With the program breaking down, working time becomes 145.5 calendar days, 4 faster, 5 days from the scheduled schedule. Increasing costs increased by Rp. 625,941,000, - but on the other hand, the time efficiency of 4.5 days amounting to Rp. 62,907,368 increased against HPP from 82,166% to 86,311% and profits increased from 17,888% to 13,689%. Other impacts are not subject to 1/1000 sanctions and avoid being blacklisted by the Owner."

"Jumlah penduduk di Jakarta mencapai 10,56 juta jiwa pada bulan September 2020. Maka dari itu, dibutuhkan gedung-gedung bertingkat sebagai pemenuh kebutuhan dari masyarakat. Dengan banyaknya limbah konstruksi yang dihasilkan oleh proyek konstruksi gedung tingkat tinggi, diperlukan adanya pengelolaan limbah konstruksi untuk meminimalkan dampak negatif yang ditimbulkan. Melalui fakta tersebut, penelitian ini dilakukan dengan tujuan untuk menganalisis kondisi eksisting di Indonesia dan beberapa negara luar serta hambatan yang dihadapi oleh kontraktor terkait penerapan sistem pengelolaan limbah konstruksi oleh di Indonesia. Metode penelitian yang digunakan adalah analisis arsip, serta survei wawancara dan kuisioner kepada para ahli kontraktor proyek konstruksi bangunan tingkat tinggi di Indonesia. Hasil dari penelitian ini menunjukkan bahwa tindakan pengelolaan limbah konstruksi yang paling banyak diterapkan di Indonesia adalah tindakan pembuangan dan yang cukup minim diterapkan adalah tindakan pemulihan. Penerapan sistem pengelolaan limbah konstruksi di Indonesia lebih baik daripada Malaysia, akan tetapi masih kurang apabila dibandingkan dengan negara Hongkong dan Spanyol. Hambatan yang dihadapi oleh kontraktor selama penerapan sistem pengelolaan limbah konstruksi di Indonesia dilihat melalui aspek ekonomi, aspek organisasi, aspek kebijakan, dan aspek teknis.

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The population in Jakarta reached 10.56 million people in September 2020. Therefore, high-rise buildings are needed to meet the needs of the community. With the large amount of construction waste generated by high-rise building construction projects, it is necessary to have construction waste management to minimize the negative impacts. Based on these facts, this research was conducted with the aim of analyzing the existing conditions in Indonesia and several foreign countries as well as the obstacles faced by contractors regarding the implementation of construction waste management systems in Indonesia. The research method used is archive analysis, as well as interview surveys and questionnaires to experts in high-rise building construction project contractors in Indonesia. The results of this study indicate that the most widely applied construction waste management action in Indonesia is a disposal and the least applied is recovery action. The implementation of the construction waste management system in Indonesia is better than in Malaysia, but still lacking when compared to Hong Kong and Spain. The obstacles faced by contractors during the implementation of the construction waste management system in Indonesia are seen through economic aspects, organizational aspects, policy aspects, and technical aspects."

"Isu lingkungan merupakan masalah yang sangat besar yang terjadi saat ini tetapi entah bagaimana orang-orang dan para pemimpin industri belum benar-benar memberikan perhatian yang cukup di bidang khusus ini karena sebagian besar dari mereka belum merasakan dampak langsungnya atau mereka hanya mengabaikan fakta bahwa itu perlahan melumpuhkan dan akan merugikan kehidupan manusia. Alasan seperti mahal, tidak penting, dan memakan waktu terlalu lama biasanya digunakan untuk menyangkal masalah yang sulit ini. Berdasarkan alasan di atas, ekonomi sirkular harus langsung diterapkan karena limbah konstruksi menyumbang sekitar 30% dari semua limbah di dunia dan bahan baku akan terbatas dalam 10 20 tahun ke depan yang dapat membuat harga meningkat tak terkendali. Dalam hal ini, prinsip ekonomi sirkular adalah solusi terbaik untuk diterapkan oleh industri konstruksi sehingga limbah dapat dikelola dan harga konstruksi tetap terkendali. Studi eksperimental sebelumnya menunjukkan bahwa limbah beton dapat digunakan untuk menggantikan batu sungai sebagai agregat kasar untuk beton yang akan dibuat untuk bangunan baru. Walaupun memiliki kekuatan yang lebih kecil dibandingkan beton biasa, namun tetap merupakan solusi yang cocok dan sangat ramah lingkungan untuk diterapkan pada industri konstruksi. Rekomendasi untuk memiliki perwakilan dari pemerhati lingkungan atau pemerintah harus hadir di lokasi konstruksi untuk memantau dan menilai kemampuan perusahaan untuk menerapkan prinsip ekonomi sirkular pada bisnis mereka.

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Environmental issue is a very big problem that is happening nowadays but somehow people and industry leaders has not really paying enough attention in this specific area because most of them has not feel the direct impact yet or they are just ignoring the fact that it slowly cripples and going to do harm to the human living. Reasons such as expensive, not important, and taking too much time are commonly used to deny this hard issue. According to the reasons stated above, circular economy should directly be implemented because construction waste donates about 30% of all the waste in the world and raw materials are going to be limited in the next 10 20 years which could make the prices increase uncontrollably. In that case, circular economy principle is the best solution for construction industry to implement so waste could be managed and construction prices would be still controlled. Previous experimental studies shows the concrete waste could be used to replace river rocks as the coarse aggregate for the concrete that is going to be made for a new building. Even though having less strength compare to the normal concrete, it is still a suitable and very environmentally friendly solution for construction industries to apply. A recommendation to have a representative from the environmental watch or government should be present in a construction site to monitor and assess the ability of the company to implement circular economy principle on their business."

"Pertumbuhan ekonomi di Indonesia mengalami penurunan pada tahun 2020. Industri konstruksi memainkan peran penting dalam pembangunan ekonomi nasional. Saat ini konstruksi menjadi fokus Pemerintah terutama pada pembangunan infrastruktur karena daya saing infrastruktur Indonesia masih tertinggal dibandingkan negara lain. Pandemi yang berlangsung sepanjang tahun 2020 tersebut berdampak signifikan terhadap sektor konstruksi yang merupakan kontributor terbesar terhadap perekonomian nasional, tidak terkecuali PT Bukaka Teknik Utama Tbk. Masalah yang sering terjadi pada proyek konstruksi adalah ketidakefisienan dan pemborosan dalam pelaksanaannya. PT Bukaka Teknik Utama Tbk mengalami penurunan revenue dan laba kotor, segmen usaha yang paling berkontribusi terhadap penurunan ini adalah konstruksi jembatan. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi pemborosan serta mencari akar masalah sering terjadi pada jalannya proyek konstruksi jembatan menggunakan penerapan lean dan metode Waste Assessment Model (WAM). Kemudian dilakukan pencarian akar masalah menggunakan fishbone diagram dan analisis FMEA. Hasil dari penelitian ini adalah waste defect merupakan pemborosan paling besar, yang kemudian diikuti oleh waste transportationdan waste inventory.

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Economic growth in Indonesia has decreased in 2020. The construction industry an important role in the development of the national economy. Currently, construction is the focus of the Government, especially in infrastructure development because Indonesia's infrastructure competitiveness is still lagging behind other countries. The pandemic that lasted throughout 2020 had a significant impact on the construction sector, which is the largest contributor to the national economy, including PT Bukaka Teknik Utama Tbk. The problem that often occurs in construction projects is inefficiency and waste in its implementation. PT Bukaka Teknik Utama Tbk experienced a decrease in revenue and gross profit, the business segment that contributed the most of this decline was bridge construction. Therefore, this study aims to identify waste and find the root causes of the problem that often occurs in the course of bridge construction projects using the application of lean and the Waste Assessment Model (WAM) method. Then search for the root cause of the problem using fishbone diagram and FMEA analysis. The result of this research is that defect waste is the biggest waste, which is then followed by transportation waste and inventory waste."

"This volume outlines a progressively staged process focused on fostering a more effective, more efficient, and greener global construction industry. The research-based book commences with an evaluation of eight methodologies identified after a worldwide literature and compliance review. It is followed by a more detailed report on four of these options, with the ultimate objective of independent selection within the construction engineering community of a single most appropriate methodology as the approach for further, more-detailed investigation. The eight methodologies were selected against six key performance indicators developed as assessment criteria and include knowledge management, lean construction, construction contract procurement practices, optimal work duration on site, construction site waste, rationalization of construction safety regulations, sustainable construction labor force, and portfolio project development. A primary outcome of the selected methodology being a triple bottom-line benefit to key stakeholders, commercially and also to the ecology, along with the community at large.Front-end construction waste strategies to serve as best practices to minimize waste generated by construction projects was the methodology selected for detailed research. The text also covers the primary sources of construction waste. The book is ideal for civil and construction engineers as well as project developers; managers and public sector waste management specialists."