Life-cycle cost analysis task summary

The DSN life cycle cost (LCC) analysis methodology was completed. The LCC analysis methodology goals and objectives are summarized, as well as the issues covered by the methodology, its expected use, and its long range implications

Maintenance/repair and production-oriented life cycle cost/earning model for ship structural optimisation during conceptual design stage

The aim of this paper is to investigate the effect of the change in structural weight due to optimisation experiments on life cycle cost and earning elements using the life cycle cost/earning model, which was developed for structure optimisation. The relation between structural variables and relevant cost/earning elements are explored and discussed in detail. The developed model is restricted to the relevant life cycle cost and earning elements, namely production cost, periodic maintenance cost, fuel oil cost, operational earning and dismantling earning. Therefore it is important to emphasise here that the cost/earning figure calculated through the developed methodology will not be a full life cycle cost/earning value for a subject vessel, but will be the relevant life cycle cost/earning value. As one of the main focuses of this paper is the maintenance/repair issue, the data was collected from a number of ship operators and was solely used for the purpose of regression analysis. An illustrative example for a chemical tanker is provided to show the applicability of the proposed approac

Analysis of Life Cycle Cost

Life-cycle cost analysis (LCCA) is an economic method of project evaluation in which all costs of the project incurred over its life period are considered to be potentially important to design decision. LCCA is particularly suitable for the evaluation of building design alternatives that satisfy a required level of building performance, but that may have different initial investment costs; different operating, maintenance, and repair costs. However, LCCA can be applied to any investment decision in which higher initial costs are traded for reduced future cost obligations. Paper develops the methodology for the life cycle cost analysis for residential building. From this study we found out that the energy efficiency approach can significantly reduce the building lifecycle cost. Thus LCCA provides a better assessment of the long-term cost effectiveness of a project

Optimising Age-Replacement and Extended Non-Renewing Warranty Policies in Lifecycle Costing

This paper analyses the life cycle cost of equipment protected by both base and extended warranty policies from a consumer's perspective. We assume that the equipment has two types of failure: minor and catastrophic. A minor failure can be corrected with minimal repair whereas a catastrophic failure can only be removed by a replacement. It is assumed that equipment is maintained at no charge to the consumer during the warranty period, whereas the consumer is fully charged for any maintenance on failures after the extended warranty expires. We formulate the expected life cycle cost of the equipment under a general failure time distribution, and then for special cases we prove that the optimal replacement and extended warranty policies exists where the expected life cycle cost per unit time is minimised. This is examined with numerical examples. © 2011 Elsevier B.V. All rights reserved

Optimizing conceptual aircraft designs for minimum life cycle cost

A life cycle cost (LCC) module has been added to the FLight Optimization System (FLOPS), allowing the additional optimization variables of life cycle cost, direct operating cost, and acquisition cost. Extensive use of the methodology on short-, medium-, and medium-to-long range aircraft has demonstrated that the system works well. Results from the study show that optimization parameter has a definite effect on the aircraft, and that optimizing an aircraft for minimum LCC results in a different airplane than when optimizing for minimum take-off gross weight (TOGW), fuel burned, direct operation cost (DOC), or acquisition cost. Additionally, the economic assumptions can have a strong impact on the configurations optimized for minimum LCC or DOC. Also, results show that advanced technology can be worthwhile, even if it results in higher manufacturing and operating costs. Examining the number of engines a configuration should have demonstrated a real payoff of including life cycle cost in the conceptual design process: the minimum TOGW of fuel aircraft did not always have the lowest life cycle cost when considering the number of engines

The multi-disciplinary design study: A life cycle cost algorithm

The approach and results of a Life Cycle Cost (LCC) analysis of the Space Station Solar Dynamic Power Subsystem (SDPS) including gimbal pointing and power output performance are documented. The Multi-Discipline Design Tool (MDDT) computer program developed during the 1986 study has been modified to include the design, performance, and cost algorithms for the SDPS as described. As with the Space Station structural and control subsystems, the LCC of the SDPS can be computed within the MDDT program as a function of the engineering design variables. Two simple examples of MDDT's capability to evaluate cost sensitivity and design based on LCC are included. MDDT was designed to accept NASA's IMAT computer program data as input so that IMAT's detailed structural and controls design capability can be assessed with expected system LCC as computed by MDDT. No changes to IMAT were required. Detailed knowledge of IMAT is not required to perform the LCC analyses as the interface with IMAT is noninteractive

Estimating life cycle cost for a product family design: The challenges

A cost estimation system is required to assist in designing a product family. The aim of this paper is to identify the requirements and the problems in estimating the life cycle cost of a product family. Then, this paper also presents the state-of-the-art and the research challenges in developing a life cycle cost estimation system for a product family design. As the conclusion, the life cycle cost estimation process for a product family still needs to face the challenges to determine the end of life strategy of each sub module of a product family, to integrate the end of life strategy to estimate the life cycle cost of a product family, to estimate the life cycle cost of each component level of a product family for design purposes and for different technologies and approaches, to reduce the required time and effort for updating process in estimating the life cycle cost for different structures of different product families, and to transform the available information into the required information in order to estimate the life cycle cost of a product family at the early stage of product development

ANALISIS LIFE CYCLE COST PADA GEDUNG GELANGGANG GENERASI MUDA KOTA BANDUNG

Bangunan mempunyai fungsi atau peran penting dalam kehidupan manusia yang disesuaikan dengan tujuan dibangunnya suatu bangunan. Salah satunya gedung Gelanggang Generasi Muda, gedung ini berfungsi untuk gabungan kesenian, olahraga dan kepemimpinan. Untuk tercapainya suatu tujuan dari gedung tersebut maka perlu adanya perencanaan pemeliharaan yang rutin, dengan begitu pembaruan atau perbaikan gedung akan rutin dilakukan sesuai dengan umur rencana bangunan. Life Cycle Cost adalah salah satu metode yang dapat digunakan untuk menganalisa nilai ekonomis sebuah bangunan dengan mempertimbangkan biaya pengoperasian sepanjang umur hidup bangunan. Namun faktanya, dalam suatu pembangunan gedung masih sangat jarang diperhitungkan terkait biaya hidup gedung dengan umur gedung yang sudah direncanakan. Pada penelitian ini penulis membuat perhitungan Life Cycle Cost berdasarkan studi pustaka dan data aktual, biaya ini terdiri dari biaya awal, biaya operasional, biaya pemeliharaan dan biaya perawatan yang dihitung hingga umur rencana bangunan. Metode yang digunakan pada penelitian ini adalah deskriptif kuantitatif. Dari hasil penelitian nilai life Cycle Cost Gedung Gelanggang Generasi Muda berdasarkan studi pustaka didapat sebesar Rp.66.470.815.590 dan dengan nilai sisa Rp.70.501.407.022, sedangkan nilai life Cycle Cost berdasarkan data aktual didapat sebesar Rp.58.432.393.417 dan dengan nilai sisa sebesar Rp.61.584.510.417. Nilai Life Cycle Cost terendah yaitu nilai Life cycle cost berdasarkan data aktual tanpa nilai sisa. Hasil perubahan tingkat suku bunga dengan rentang ±30% bahwa nilai Life Cycle Cost akan naik jika suku bunga turun, dan nilai Life Cycle Cost akan turun jika suku bunga naik.;--Building have an important role in human life in all aspect tailored to the function of the building. Gelanggang Generasi Muda (GGM) is the one building that was built for this function. This building functions is the place for teenager to develop their skills, such as; art, leadership, and sport. To achive this purpose of the building, we must plan about routine maintenance, repair, and renewal of the building components, to make it reach the age of the building plan. Life Cycle Cost is the one of the method that can be used to analize the economic value of a building by considering operating costs over the life of the building. But the fact is, it is still rare for building to calculated its cost that used during the age of the building that has been planned. In this study the authors make Life Cycle Cost calculations based on literature studies and actual data, these costs consist of initial costs, operational costs, maintenance costs and renewal costs that are calculated to the age of the building plan. Descriptive quantitative is the method that used in this research. From the research results, life cycle cost value for the Gelanggang Generasi Muda Building based on literature study is Rp.66.470.815.590 and with a residual value is Rp.70.501.407.022, while the value of the life cycle cost based on actual data is Rp.58.432.393.417 and with a residual value is Rp.61.584.510.417. The lowest value of Life Cycle Cost is the value of Life cycle cost based on actual data without residual value. Changes in interest rates with a range of ± 30%, the value of Life Cycle Cost will increase if interest rates fall, and the value of Life Cycle Cost will decrease if interest rates rise