Rekomendasi Tindakan Koreksi Terhadap Penyimpangan Biaya Pembelian Material Konstruksi

. In delivering construction projects, is not uncommon that cost overrun occur due to variation on materials, equipments, labors, subcontractors, overhead, and general condition. Material contributes around half of the construction project, which make material management becomes an important element in project cost control. And in managing construction materials, purchasing has become major influence on material cost. Corrective actions on cost overrun can be used to overcome the cost variance due to poor material purchasing. This paper is aimed at identifying what causes of purchasing material cost variances and correctice action recommendation. Research method to identifying purchasing material cost variance and corrective action recommendation using questionnaire survey and interview distributed to high rise building projects. Analyze method using analytical hierarchy process (AHP) and Delphi method. The result show that corrective action recommendationon purchasing material cost overrun is preventif action (before process variance)

Carbon dioxide reduction in the building life cycle: a critical review

The construction industry is known to be a major contributor to environmental pressures due to its high energy consumption and carbon dioxide generation. The growing amount of carbon dioxide emissions over buildings’ life cycles has prompted academics and professionals to initiate various studies relating to this problem. Researchers have been exploring carbon dioxide reduction methods for each phase of the building life cycle – from planning and design, materials production, materials distribution and construction process, maintenance and renovation, deconstruction and disposal, to the material reuse and recycle phase. This paper aims to present the state of the art in carbon dioxide reduction studies relating to the construction industry. Studies of carbon dioxide reduction throughout the building life cycle are reviewed and discussed, including those relating to green building design, innovative low carbon dioxide materials, green construction methods, energy efficiency schemes, life cycle energy analysis, construction waste management, reuse and recycling of materials and the cradle-to-cradle concept. The review provides building practitioners and researchers with a better understanding of carbon dioxide reduction potential and approaches worldwide. Opportunities for carbon dioxide reduction can thereby be maximised over the building life cycle by creating environmentally benign designs and using low carbon dioxide materials

The desire for the construction industry to move towards lifecycle carbon emissions analysis

A significant reduction in carbon emissions is a global mission and the construction industry has an indispensable role to play as a major carbon dioxide (CO2) generator. Over the years, various building environmental assessment (BEA) models and concepts have been developed to promote environmentally responsible design and construction. However, limited attention has been placed on assessing and benchmarking the carbon emitted throughout the lifecycle of building facilities. This situation could undermine the construction industry’s potential to reduce its dependence on raw materials, recognise the negative impacts of producing new materials, and intensify the recycle and reuse process. In this paper, current BEA approaches adopted by the construction industry are first introduced. The focus of these models and concepts is then examined. Following a brief review of lifecycle analysis, the boundary in which a lifecycle carbon emission analysis should be set for a construction project is identified. The paper concludes by highlighting the potential barriers of applying lifecycle carbon emissions analysis in the construction industry. It is proposed that lifecycle carbon emission analysis can be integrated with existing BEA models to provide a more comprehensive and accurate evaluation on the cradle-to-grave environmental performance of a construction facility. In doing so, this can assist owners and clients to identify the optimum solution to maximise emissions reduction opportunities

Corrective action recommendation for project cost variance in construction material management

In construction project operation, often there is a project cost variance in terms of the material, equipments, manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore, if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking corrective actions towards the cost variance. The objective of this research paper is to identify the main cause of the cost variance and to recommend the corrective actions. The approach to serve that objective is by conducting surveys to high rise building construction projects in order to identify the cause of project cost variance in material purchasing, and by interviewing experts in order to obtain recommendations in taking corrective actions. Method Analysis used in this research is Delphi method. The result of the research shows that the corrective action towards the variance of the material purchasing cost is actually a preventive action (before process

Risk analysis in feasibility study of building construction project: case study - PT. Perusahaan Gas Negara Indonesia

Investment in construction project is able to give higher benefit beside of its high uncertainty. The uncertainty depends on many risk factors. The influence of the identified risk then has to be evaluated and calculated towards the project feasibility. Before investment, the feasibility of the project has to be done that gives figures of cash flow on the following years. This can be one of the considerations for making a decision whether this project is feasible or not. Risks that overshadow the construction project have to be calculated as an influential factor towards the failure of a project. This paper aims to know the feasibility of project investment by calculating the risk factors and treatment. Risk probability matrix is used to obtain the risk priority, which then continued with financial analysis for the feasibility study and also sensitivity analysis. The study shows that the parameter investment value will be increased when treatment is done on risk

Rekomendasi Tindakan Koreksi Terhadap Penyimpangan Biaya Pembelian Material Konstruksi

Abstrak. Dalam pelaksanaan proyek konstruksi sering terjadi penyimpangan biaya yang disebabkan antara lain oleh material, peralatan, tenaga kerja, subkontraktor, overhead, dan kondisi umum. Material merupakan komponen biaya utama dalam proyek konstruksi, sehingga manajemen material yang kurang baik dapat mengakibatkan penyimpangan biaya proyek. Pada manajemen material, pembelian material merupakan faktor yang mempunyai pengaruh cukup besar terhadap besar kecilnya harga material. Pengendalian biaya proyek terhadap terjadinya penyimpangan biaya yang disebabkan oleh kurang baiknya pembelian material, dapat dilakukan dengan tindakan koreksi terhadap penyebab-penyebab terjadinya penyimpangan biaya tersebut. Tujuan penelitian dalam makalah ini adalah mengidentifikasi penyebab terjadinya penyimpangan biaya pembelian material dan melakukan rekomendasi tindakan koreksi terhadap penyebab penyimpangan. Pendekatan yang dilakukan untuk mencapai tujuan tersebut adalah dengan melakukan survai terhadap proyek-proyek konstruksi bangunan bertingkat untuk mengidentifikasi penyebab terjadinya penyimpangan biaya pembelian material, serta wawancara kepada para pakar untuk memperoleh rekomendasi tindakan koreksi. Metode analisis yang digunakan dalam penelitian ini adalah analytical hierarchy process (AHP) dan metode Delphi. Hasil penelitian menunjukkan tindakan koreksi yang dilakukan terhadap penyimpangan biaya pembelian material merupakan tindakan pencegahan (before process).Abstract. In delivering construction projects, is not uncommon that cost overrun occur due to variation on materials, equipments, labors, subcontractors, overhead, and general condition. Material contributes around half of the construction project, which make material management becomes an important element in project cost control. And in managing construction materials, purchasing has become major influence on material cost. Corrective actions on cost overrun can be used to overcome the cost variance due to poor material purchasing. This paper is aimed at identifying what causes of purchasing material cost variances and correctice action recommendation. Research method to identifying purchasing material cost variance and corrective action recommendation using questionnaire survey and interview distributed to high rise building projects. Analyze method using analytical hierarchy process (AHP) and Delphi method. The result show that corrective action recommendationon purchasing material cost overrun is preventif action (before process variance)

Rekomendasi Tindakan Koreksi Terhadap Penyimpangan Biaya Pembelian Material Konstruksi (Recommended Corrective Actions for Construction Material Cost Variance)

In delivering construction projects, is not uncommon that cost overrun occur due to variation on materials, equipments, labours, subcontractors, overhead, and general condition. Material contributes around half of the construction project cost, which make material management becomes an importan element in project cost control. In managing construction materials, purchasing has become major major influence on material cost. Corrective actions on cost overrun can be used to overcome the cost variance due to poor material purchasing. This paper is aimed att identiying the causes of purchasing material cost variances and corrective actions recommendation. Questionnaire survey and interview were used as methods for collecting data which obtained from various highrise building projects. The data collected was analysed using AHP. The results show that recommended corrective actions on purchasing material cost overrun should be more preventive in natur