scholarly journals Integration of Life Cycle Data in a BIM Object Library to Support Green and Digital Public Procurements

2020 ◽  
Vol 15 (7) ◽  
pp. 983-990
Author(s):  
Ambra Barbini ◽  
Giada Malacarne ◽  
Katrien Romagnoli ◽  
Giovanna A. Massari ◽  
Dominik T. Matt
Keyword(s):  
Life Cycle ◽  
Evaluation System ◽  
Economic Impacts ◽  
Public Procurement ◽  
Construction Costs ◽  
Project Phases ◽  
Digital Methods ◽  
Minimum Criteria ◽  
Bim Object ◽  
Mandatory Use

To reduce the environmental and economic impacts of the construction sector it is essential to follow sustainable models in each stage of the design process, including the procurement phase. Construction costs are generally calculated at this stage, overlooking life-cycle impacts. Since 2016, the Italian code of public procurement requests to comply with environmental minimum criteria and introduced the mandatory use of digital methods and tools. Given the opportunity to exchange information through BIM objects, this research explores the possibility to manage environmental and economic data with digital methods and tools in public procurement. This paper presents an evaluation system and a workflow to support the decision makers in considering the life cycle of a construction, optimizing environmental and economic impacts. The evaluation system developed is based on parameters, focused on environmental and economic impacts. Parameters have been collected analyzing and comparing sustainability norms and protocols. Results show that the developed system not only can support a public body during the procurement phase, but also delivers a database for further project phases, such as operation and end of life.

scholarly journals Life Cycle Cost Analysis of a Single-Family House in Sweden

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 215
Author(s):  
Bojana Petrović ◽  
Xingxing Zhang ◽  
Ola Eriksson ◽  
Marita Wallhagen
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Single Family ◽  
Labor Costs ◽  
Construction Costs ◽  
Economic Parameters ◽  
A Minor ◽  
Family House ◽  
Replacement Operation

The objective of this paper was to explore long-term costs for a single-family house in Sweden during its entire lifetime. In order to estimate the total costs, considering construction, replacement, operation, and end-of-life costs over the long term, the life cycle cost (LCC) method was applied. Different cost solutions were analysed including various economic parameters in a sensitivity analysis. Economic parameters used in the analysis include various nominal discount rates (7%, 5%, and 3%), an inflation rate of 2%, and energy escalation rates (2–6%). The study includes two lifespans (100 and 50 years). The discounting scheme was used in the calculations. Additionally, carbon-dioxide equivalent (CO2e) emissions were considered and systematically analysed with costs. Findings show that when the discount rate is decreased from 7% to 3%, the total costs are increased significantly, by 44% for a 100-year lifespan, while for a 50 years lifespan the total costs show a minor increase by 18%. The construction costs represent a major part of total LCC, with labor costs making up half of them. Considering costs and emissions together, a full correlation was not found, while a partial relationship was investigated. Results can be useful for decision-makers in the building sector.

Discuss on Green Building Materials and Related Issues

2011 ◽  
Vol 280 ◽  
pp. 165-170
Author(s):  
Shi Jin Wang
Keyword(s):  
Sustainable Development ◽  
Life Cycle ◽  
Evaluation System ◽  
Building Materials ◽  
Green Building ◽  
Future Trend ◽  
Life Cycle Model ◽  
Cycle Model ◽  
Green Building Materials ◽  
The Evaluation System

Green building materials as an important factor plays important role in the promote sustainable development. However, at present a unified understanding on the green building materials in China have not been formed,the evaluation system of green building materials is not perfect.In this paper,the concept and features of green building materials are discussed deeply,and life cycle model is used to evaluate the green building materials.The status and future trend of green building materials are discussed too.

scholarly journals Decision to paving solutions in road infrastructures based on life-cycle assessment

2016 ◽  
Vol 11 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Maria de Lurdes Antunes ◽  
Vânia Marecos ◽  
José Neves ◽  
João Morgado
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Decision Process ◽  
Life Cycle Cost ◽  
Road Network ◽  
Construction Costs ◽  
Road Pavement ◽  
Pavement Structures ◽  
Using Data ◽  
Term Performance

The construction and maintenance of a road network involve the expenditure of large budgets. In order to optimize the investments in road infrastructures, designers and decision makers should have the instruments to make the most suitable decision of paving solutions for each particular situation. The life-cycle assessment is an important tool of different road pavement solutions with this purpose. This paper presents a study concerning the life-cycle cost analysis of different flexible and semi-rigid paving alternatives, with the objective to contribute for a better support in the decision process when designing new pavement structures. The analysis was carried out using data on construction costs of certain typical pavement structures and taking into consideration appropriate performance models for each type of structure being selected. The models were calibrated using results from long term performance studies across Europe and the maintenance strategies considered have taken into account the current practice also found in the European context. Besides the life-cycle administration costs, the proposed methodology also deals with user and environmental costs through its inclusion in the decision process using multi-criteria analysis. It was demonstrated that this methodology could be a simple and useful tool in order to achieve the most adequate paving solutions of a road network, in terms of construction and maintenance activities, based simultaneously on technical, economic and environmental criteria.

scholarly journals Status quo and development potential of full life cycle evaluation of construction waste

2021 ◽  
Vol 237 ◽  
pp. 01035
Author(s):  
Jingming Jia ◽  
Fumin Ren ◽  
Jintong Zhu
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Evaluation System ◽  
Status Quo ◽  
Construction Waste ◽  
Development Potential ◽  
Full Life Cycle ◽  
Full Life ◽  
Periodic Evaluation ◽  
The Evaluation System

It is critically important to synthesize the life-cycle assessment (LCA) and construction waste content, especially in term in recycling of construction waste resources[1] and optimizing critria in the lifecycle evaluation. That is, the development of construction waste resources is entitled to be boosted, as same as criteria and elements in periodic evaluation concentrating on the module of construction waste. This paper analyzes the disadvantages of construction waste and potential promotion in each stage, which is of great significance for improving the evaluation system and management of construction waste.

Comparison of Building Construction and Life-Cycle Cost for a High-Rise Mass Timber Building with its Concrete Alternative

2020 ◽  
Vol 70 (4) ◽  
pp. 482-492
Author(s):  
Hongmei Gu ◽  
Shaobo Liang ◽  
Richard Bergman
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Building Materials ◽  
Building Design ◽  
Cost Data ◽  
Construction Costs ◽  
High Rise ◽  
Front End ◽  
Concrete Building ◽  
Mass Timber

Abstract Mass timber building materials such as cross-laminated timber (CLT) have captured attention in mid- to high-rise building designs because of their potential environmental benefits. The recently updated multistory building code also enables greater utilization of these wood building materials. The cost-effectiveness of mass timber buildings is also undergoing substantial analysis. Given the relatively new presence of CLT in United States, high front-end construction costs are expected. This study presents the life-cycle cost (LCC) for a 12-story, 8,360-m2 mass timber building to be built in Portland, Oregon. The goal was to assess its total life-cycle cost (TLCC) relative to a functionally equivalent reinforced-concrete building design using our in-house-developed LCC tool. Based on commercial construction cost data from the RSMeans database, a mass timber building design is estimated to have 26 percent higher front-end costs than its concrete alternative. Front-end construction costs dominated the TLCC for both buildings. However, a decrease of 2.4 percent TLCC relative to concrete building was observed because of the estimated longer lifespan and higher end-of-life salvage value for the mass timber building. The end-of-life savings from demolition cost or salvage values in mass timber building could offset some initial construction costs. There are minimal historical construction cost data and lack of operational cost data for mass timber buildings; therefore, more studies and data are needed to make the generalization of these results. However, a solid methodology for mass timber building LCC was developed and applied to demonstrate several cost scenarios for mass timber building benefits or disadvantages.

scholarly journals Integrated guide for public procurement and private contracts of collective catering system and SDGs

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
G Barocco ◽  
V Patussi ◽  
M Cella ◽  
D Germano ◽  
A Pernarcic ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Evaluation System ◽  
Sustainable Development Goals ◽  
Public Procurement ◽  
National Level ◽  
Health Agency ◽  
Local Health ◽  
Food Standards ◽  
Development Goals ◽  
Technical Specifications

Abstract Surveys (2008-2018) carried out by the Local Health Agency of Trieste (ASUITS) in local collective catering (CC) services of schools, hospitals, nursing homes, and workplaces (25.000 daily meals) have shown some non - adherence to healthier food choices, food standards, procedures and green and social procurement as recommended by the WHO, FAO, UE, Ministry of Health and of Environment. The purpose of this project is to support local public and private organizations in transforming the national and regional catering services food standards related to health, nutrition, environment and social criteria into food procurement and food contracts specifications. This has been done by compiling the major obstacles to improved standards observed during surveys, and by sharing critical and relevant examples with major public contractors across local, regional and national level. The guidelines (GL) for public procurement of CC consist of five chapters: the elaboration of specifications; a response module to present the offer of services; selection and award criteria, an evaluation system of offers, and the technical specifications attached. Technical information fixes the constituent elements of the service in order to have similar and directly comparable offers. GL cover both the purchasing of food and the contracting of catering services. In this way public or private institutions are able to prepare tender documents suitable to respond to health, economic needs and Sustainable Development Goals (SDGs). The development of the GL has increased the awareness and real potential that local organizations have in enhancing the strategic use of purchasers to boost food qualification, jobs, growth and investment. As well as to create a more innovative economy, to be resource and energy efficient, and to be socially-inclusive. To meet population nutrient intake goals and SDGs it is necessary to increase co-operation and the sharing of the objectives of ’Health in All Policies’. Key messages Contractors need practical tools to apply sustainable development goals criteria in collective catering. The integrated collective catering guide is a key to improving capacity building in institutions.

scholarly journals Power grid technology economic evaluation system based on life cycle theory

2019 ◽  
Vol 237 (6) ◽  
pp. 062040
Author(s):  
Nan Xu ◽  
Ning Xu ◽  
Yan Song ◽  
Dongchao Wang ◽  
Yanqin Wang ◽  
...  
Keyword(s):  
Life Cycle ◽  
Economic Evaluation ◽  
Evaluation System ◽  
Power Grid ◽  
Grid Technology ◽  
Life Cycle Theory

scholarly journals Development of a Model for Predicting Probabilistic Life-Cycle Cost for the Early Stage of Public-Office Construction

2019 ◽  
Vol 11 (14) ◽  
pp. 3828 ◽  
Author(s):  
Jin ◽  
Kim ◽  
Hyun ◽  
Han
Keyword(s):  
Life Cycle ◽  
Prediction Model ◽  
Life Cycle Cost ◽  
Construction Projects ◽  
Prediction Models ◽  
Early Stage ◽  
Case Based Reasoning ◽  
Probabilistic Prediction ◽  
Construction Costs ◽  
Early Stages

Decisions made in the early stages of construction projects significantly influence the costs incurred in subsequent stages. Therefore, such decisions must be based on the life-cycle cost (LCC), which includes the maintenance, repair, and replacement (MRR) costs in addition to construction costs. Furthermore, as uncertainty is inherent during the early stages, it must be considered in making predictions of the LCC more probabilistic. This study proposes a probabilistic LCC prediction model developed by applying the Monte Carlo simulation (MCS) to an LCC prediction model based on case-based reasoning (CBR) to support the decision-making process in the early stages of construction projects. The model was developed in two phases: first, two LCC prediction models were constructed using CBR and multiple-regression analysis. Through k-fold validation, one model with superior prediction performance was selected; second, a probabilistic LCC model was developed by applying the MCS to the selected model. The probabilistic LCC prediction model proposed in this study can generate probabilistic prediction results that consider the uncertainty of information available at the early stages of a project. Thus, it can enhance reliability in actual situations and be more useful for clients who support both construction and MRR costs, such as those in the public sector.

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