scholarly journals A Method of Determining Rail Grinding Parameters Based On Life-Cycle Cost

2014 ◽  
Vol 8 (1) ◽  
pp. 544-550 ◽  
Author(s):  
Wang Jianxi ◽  
Chen Siyi ◽  
Gui Jirong
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Life Cycle Cost ◽  
Economic Cost ◽  
Present Value ◽  
Factors Affecting ◽  
Optimal Analysis ◽  
Rail Grinding ◽  
Grinding Parameters ◽  
Rail Service

The factors affecting the economy efficiency of rail grinding and their interrelation are researched. Based on the management theory of life-cycle cost, the model of analyzing rail grinding parameters is established, the calculation method is determined, and minimizing the rail life-cycle cost is regarded as optimization objective for the optimal analysis of grinding factor. The results prove that with certain parameters (grinding interval and mental removal), the total present value of rail cost tends to decrease firstly and then increase with the increase of rail service life. With the increase of the grinding interval, the total present value of rail cost also tends to decrease firstly and then increase, and there is an extreme point in the variation tendency. In the economic cost of rail service life, rail replacement and waste of railway taking-up cost are two of the biggest parts. Therefore, reasonable rail maintenance strategy plays a significant role in reducing life-cycle cost.

Life Cycle Cost Analysis on Impregnated Bridge Edge Beams

2014 ◽  
Vol 20 (6) ◽  
pp. 441-446
Author(s):  
O. During ◽  
K. Malaga
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Economic Benefit ◽  
Economic Cost ◽  
Life Cycle Cost Analysis ◽  
Economic Analyses

Abstract The aim of this study is to perform a life cycle cost analysis (LCC), where the economic cost of extending service life by the impregnation of bridge edge beams is compared to the reparation of an edge beam. Previous economic analyses on bridge edge beams had shown that there was no clear economic benefit in impregnating the edge beams. However, results from this study pointed out that in most cases there is a clear economic benefit to impregnate the bridge edge beams even if it has to be repeated every 15 years.

scholarly journals The determination of the repairs of railway track considering the reliability and risk level

2020 ◽  
Vol 157 ◽  
pp. 06031
Author(s):  
Nikolai Kovalenko ◽  
Elena Grin ◽  
Nina Kovalenko
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Life Cycle Cost ◽  
The State ◽  
Railway Track ◽  
Main Element ◽  
Risk Level ◽  
Standard Service

The method of predictive calculations of the state of the rails as the main element of assessing the state of the track when planning major repairs of the track is given. With a standard service life of 600 to 700 million tons gross, it is necessary to predict the number of defective rails on the track when increasing the service life to 1100 million tons gross (considering local rail replacement during intermediate repairs). The polygon for assigning repairs is determined by the number of “Windows” that can be provided per week on the section. The projected increase in the work of the track causes the need to increase life cycle cost depreciation charges for the formation of the repair Fund for capital repairs by 30-35%.

Life Cycle Cost Analysis Case Study on Corrosion Remedial Measures for Concrete Structures

2012 ◽  
Author(s):  
Jin How Ho ◽  
Azlan Abd. Rahman
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Net Present Value ◽  
Cost Effective ◽  
Concrete Bridges ◽  
Analysis Tool ◽  
Life Cycle Cost Analysis ◽  
Remedial Measures ◽  
Present Value

Artikel ini membincangkan kajian ringkas berkaitan analisis kos kitaran hayat terhadap langkah-langkah pembaikan pengaratan bagi jambatan dan struktur marin konkrit yang terdedah kepada karbonasi atau serangan natrium klorida daripada air laut atau sumber-sumber lain. Perisian kos kitaran hayat, Bridge LCC 2.0 digunakan untuk menjalankan analisi kitaran hayat untuk tiga kes kajian melibatkan kaedah nilai bersih kini. Keputusan kajian menunjukkan analisis kos kitaran hayat berkeupayaan untuk membantu jurutera dan agensi pengangkutan dalam menilai keputusan penyelenggaraan yang efektif berkaitan dengan masalah pengaratan. Ia boleh digunakan sebagai alat analisis ekonomi kejuruteraan yang membantu mantaksir kos-kos perbezaan dan membuat pilihan terhadap langkah pembaikan pengaratan yang berkesan. Analisis kos kitaran hayat bagi langkah pembaikan dipengaruhi oleh banyak pemboleh ubah seperti kos permulaan, kos penyelenggaraan, tahun kekerapan, dan jangka masa analisis. Amalan terbaik untuk analisis kos kitaran hayat bukan sahaja mengambil kira perbelanjaan oleh agensi, tetapi perlu mempertimbangkan kos-kos oleh pengguna dan analisis sensitiviti di sepanjang jangka hayat sesuatu langkah pembaikan. Kata kunci: Analisis kos kitaran hayat, jambatan konkrit, pengaratan, langkah, pembaikan, pemulihan struktur, keberkesanan kos, kaedah nilai bersih kini (NPV) This paper discusses a short study on life cycle cost analysis (LCCA) on corrosion remedial measures for concrete bridges and marine structures, which are subjected to carbonation or ingress of sodium chloride from sea water and other sources. Life cycle costing software, Bridge LCC 2.0, was used to perform life cycle cost analyses on three case studies, based on net present value method. The analysis of the results showed that LCCA is capable of assisting engineers or transportation agencies to evaluate optimum maintenance decisions in corrosion–related problems. It can be used as an engineering economic analysis tool that helps in qualifying the differential costs and choosing the most cost–effective corrosion remedial measures. Life cycle costs for the remedial measures are influenced by many costing variables such as initial costs, periodic maintenance costs, frequency years and analysis period. The best practice of LCCA should not only consider agency expenditures but also user costs and sensitivity analysis throughout the service life of a remedial measure. Key words: Life cycle analysis, concrete bridges, corrosion, remedial measures, structural rehabilitation, cost-effective, net present value method (NPV)

scholarly journals Evaluation of non-cost factors affecting the life cycle cost: an exploratory study

2016 ◽  
Vol 14 (4) ◽  
pp. 818-834 ◽  
Author(s):  
Ayedh Alqahtani ◽  
Andrew Whyte
Keyword(s):  
Life Cycle ◽  
Survey Data ◽  
Cost Estimation ◽  
Life Cycle Cost ◽  
Accurate Estimation ◽  
Capital Operation ◽  
Building Projects ◽  
Content Type ◽  
Factors Affecting ◽  
Cost Factors

Purpose This paper aims to identify the main non-cost factors affecting accurate estimation of life cycle cost (LCC) in building projects. Design/methodology/approach Ten factors affecting LCC in building project cost estimates are identified through literature and interviews. A questionnaire survey is conducted to rank these factors in order of priority and provide the views of cost practitioners about the significance of these factors in the accurate estimation of LCC. The data from 138 construction building projects completed in UK were collected and analysed via multiple regression to discover the relationship between capital and LCCs and between non-cost factors and cost estimation at each stage of the life cycle (capital, operation, maintenance and LCC). Findings The results of analysis of existing LCC data of completing project and survey data from cost professionals are mostly consistent with many literature views and provide a reasonable description of the non-cost factors affecting the accuracy of estimates. Originality/value The value of this study is in the method used, which involves analysis of existing life data and survey data from cost professionals. The results provide a plausible description of the non-cost factors affecting the accuracy of estimates.

scholarly journals IMPLEMENTASI LIFE CYCLE COST PADA GEDUNG BANK MANDIRI SYARIAH YOGYAKARTA

2020 ◽  
Vol 8 (1) ◽  
pp. 46-55
Author(s):  
Sola Fide Krisnanda
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Net Present Value ◽  
Life Cycle Cost Analysis ◽  
Present Value

Dalam pembangunan sebuah gedung, pemilik gedung pasti dihadapkan dengan berbagai alternatif dalam melakukan pemilihan suatu material, produk ataupun sistem gedung. Selain aspek teknis, biaya pun turut menjadi aspek penting yang perlu menjadi salah satu pertimbangan. Untuk mengetahui pilihan alternatif yang lebih hemat diperlukan metode penghitungan, salah satunya adalah dengan menggunakan metode  analisis life cycle cost (LCC). LCC menghitung keseluruhan biaya mulai dari biaya awal, biaya penggantian serta biaya operasional dan pemeliharaan. Metode yang dilakukan pada studi ini menggunakan life cycle cost analysis berdasarkan ISO 15686:5 dengan periode 25 tahun. Net present value juga diterapkan dalam perhitungan untuk mencari nilai saat ini dari total LCC. Hasil perhitungan pada bangunan Bank Mandiri Syariah Yogyakarta dirumuskan menjadi tiga kelompok estimasi biaya yaitu biaya awal, biaya operasional dan biaya pemeliharan dan penggantian dengan besar biaya masing-masing Rp 19,412,002,758 (47%), Rp 15,979,434,435 (39%) dan Rp 5,868,499,911 (14%). Total LCC 25 tahun sebesar Rp 41,259,937,014.

scholarly journals Kajian Teknis Dan Ekonomis Penerapan Sistem Hibrid BAPV-PLN Pada Gedung Politeknik Aceh

2019 ◽  
Vol 2 (2) ◽  
pp. 166
Author(s):  
Rachmad Ikhsan
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Net Present Value ◽  
Present Value ◽  
Banda Aceh

<p>Potensi radiasi matahari yang cukup besar (rata-rata 4,65 kWh/m<sup>2</sup>/hari) di wilayah Banda Aceh dapat dimanfaatkan untuk membangun sistem hibrid BAPV (<em>Building Applied Photovoltaic</em>)-PLN. Namun, penerapan sistem konversi energi surya menjadi energi listrik kurang berkembang di Aceh. Kondisi ini disebabkan oleh harga teknologi modul surya masih dianggap mahal bagi masyarakat. Studi ini juga melakukan kajian secara teknis dan ekonomis dari sistem BAPV yang diterapkan. Kajian teknis yang digunakan bertujuan menentukan apakah jumlah energi yang dihasilkan oleh sistem BAPV dapat memenuhi jumlah beban listrik pada Gedung Politeknik Aceh. Sementara kajian ekonomis bertujuan memperkirakan biaya investasi yang diperlukan untuk menerapkan sistem BAPV dan menentukan kapan sistem BAPV bernilai ekonomis. Metode yang digunakan pada kajian teknis yaitu perhitungan secara teori, sedangkan metode yang digunakan untuk kajian ekonomis adalah metode <em>Life Cycle Cost</em>.  Dari hasil kajian teknis, energi yang dihasilkan oleh sistem BAPV ini dapat memenuhi kebutuhan energi listrik tahunan dengan <em>surplus</em> energi sebesar 6.017 kWh/tahun. Dari hasil kajian ekonomis, sistem ini bernilai ekonomis karena memiliki nilai NPV (<em>Net Present Value</em>) sebesar Rp. 1.310.803.600 dan  nilai PP (<em>Payback Periode</em>) selama 14 Tahun. Berdasarkan kajian teknis dan ekonomis dapat disimpulkan penerapan sistem hibrid BAPV-PLN ini dapat dilaksanakan karena bernilai ekonomis.</p>

scholarly journals Significant Factors Affecting the Life Cycle Cost Elements of a Building

FARU Journal ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 57
Author(s):  
J. Samaranayake ◽  
T. Ramachandra ◽  
U. G. D. Madushika
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Factors Affecting ◽  
Significant Factors

scholarly journals Benefit and Cost Periodized: Stretching Your Points

2021 ◽  
pp. 87-100
Author(s):  
Jo Erskine Hannay
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Net Present Value ◽  
Common Method ◽  
Present Value ◽  
Cost And Benefit ◽  
Good Case ◽  
Return Of Investment ◽  
Software Product

AbstractWhen you estimate the life cycle cost and benefit of your software product, your stakeholders should not only be assured that you will deliver value, but also be informed when that value is expected to manifest itself. Periodization is a common method for showing when a return of investment is expected, and one is often careful to express the present value of future cash (net present value) in such deliberations. This chapter shows how to carry out periodization using points. Periodized points then amount to plan templates that can be instantiated with monetary values according to most likely, bad-case, and good-case uncertainty assessments.

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