scholarly journals Research on coating technology with wet-process sprayed mortar: waste and productivity

2020 ◽  
Vol 27 (3) ◽  
Author(s):  
Denise Ribeiro ◽  
Gabriela Alves Tenório de Morais ◽  
Alberto Casado Lordsleem Júnior
Keyword(s):  
Decision Making ◽  
Labor Productivity ◽  
Coating Technology ◽  
Detailed Measurement ◽  
Wet Process ◽  
External Coating ◽  
Construction Works

Abstract The mechanical application of mortar is as an adequate solution to minimize the problems in the execution of internal and external coating of the buildings. However, few scientific studies address the gains in efficiency afforded by mechanization as well as the scarce parameters of waste, productivity and quality that could contribute to choosing this technology. This article aims to characterize the presented constructive technology and to investigate the waste of mortar (percentage of losses and consumption) and the productivity of the labor in the execution of internal and external coating for sealing in the application of wet-process sprayed mortar. Investigations were carried out in 08 construction works, which presented results of up to 150% and 0.18h/m2 for, respectively, loss of industrialized mortar and labor productivity. Thus, the present research contributes to the advancement of the knowledge about the wet-process sprayed mortar by increasing the understanding of the technology. Other important contributions are the indicators of losses and productivity and their detailed measurement, which are efficient tools to assist the companies in the decision-making by adopting this technology as well as in the management of the activities during the execution process.

scholarly journals DAMPAK TEKNOLOGI AGRICULTURE GROWTH PROMOTING INOCULANT (AGPI) PADA USAHATANI PADI SAWAH DI KABUPATEN SLEMAN

Agro Ekonomi ◽  
2010 ◽  
Vol 17 (1) ◽  
Author(s):  
Ken Suratiyah
Keyword(s):  
Decision Making ◽  
Labor Productivity ◽  
Collective Decision ◽  
Collective Decision Making ◽  
Rice Farming ◽  
Total Cost ◽  
Growth Promoting ◽  
Farmer Groups ◽  
Production Prices

This research was carried out in the Margo Agung villagem Seyegan subdistrict, Sleman regency, which aims (1) to identify how farmers use AGPI technology in rice farming, (2) to know the production, sot, incomes of farmers, (3) to analyze feasibility of rice farming and social prospect that includes the performance of farmer groups in implementing AGPI technology. The basic method in this study is descriptive analytical. The population are farmers who have applied AGPI technology on rice farming in the Sleman Regency, while the respondents were 30 farmers who are members of the farmers grup of Agung Bergas and Sumber Rejeki, in Margo Agung village, Seyegan Subdistrict. The result shows that (1) implementation of AGPI technology, the role of farmer groups as medium of learning, collective decision making and production unit tend to be higher, (2) AGPI technology increase the total cost and labour but yields enhancement in rice production and income, (3) AGPI technology increase implementation is feasible, showed by the R/C>1, income > rental cost, π/C > bank interest, labor productivity > UMK, production, revenue, and the production prices > BEP.

Effects of the Pipelines External Coating Technology Selection in the Definition of the Pipeline Design Strategy

2019 ◽  
Author(s):  
Tommaso Mantegazza ◽  
Francesco Negro ◽  
Eric Gildemyn ◽  
Marco Savazzi ◽  
Jude Esangbedo ◽  
...  
Keyword(s):  
Design Strategy ◽  
Technology Selection ◽  
Coating Technology ◽  
Definition Of ◽  
Pipeline Design ◽  
External Coating

scholarly journals Detailed Measurement of Wall Strain with 3D Speckle Tracking in the Aortic Root: A Case of Bionic Support for Clinical Decision Making

2016 ◽  
Vol 05 (01) ◽  
pp. 77-80 ◽  
Author(s):  
Konstantinos Karatolios ◽  
Andreas Wittek ◽  
Christopher Blasé ◽  
Anette Ramaswamy ◽  
Nikolas Mirow ◽  
...  
Keyword(s):  
Decision Making ◽  
Aortic Root ◽  
Speckle Tracking ◽  
Clinical Decision Making ◽  
Clinical Decision ◽  
Detailed Measurement

Discretion and Supplier Selection in Public Procurement

2020 ◽  
Author(s):  
Audinga Baltrunaite ◽  
Cristina Giorgiantonio ◽  
Sauro Mocetti ◽  
Tommaso Orlando
Keyword(s):  
Decision Making ◽  
Labor Productivity ◽  
Supplier Selection ◽  
Public Procurement ◽  
Public Works ◽  
Public Funds ◽  
Ex Ante

Abstract Public procurement outcomes depend on the ability of the procuring agency to select well-performing suppliers. Should public administrations be granted more or less discretion in their decision-making? Using Italian data on municipal public works tendered in the period 2009–13, we study how a reform extending the scope of bureaucrat discretion affects supplier selection. We find that the share of contracts awarded to politically connected firms increases while the (ex ante) labor productivity of the winning firm decreases, thus suggesting a potential misallocation of public funds. The results are heterogeneous across procuring agencies: the effects on supplier selection are primarily concentrated among less qualified and less transparent administrations. (JEL D72, D73, H57, P16)

scholarly journals Prioritizing Construction Labor Productivity Improvement Strategies Using Fuzzy Multi-Criteria Decision Making and Fuzzy Cognitive Maps

Algorithms ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 254
Author(s):  
Matin Kazerooni ◽  
Phuong Nguyen ◽  
Aminah Robinson Fayek
Keyword(s):  
Decision Making ◽  
Labor Productivity ◽  
Cognitive Maps ◽  
The Body ◽  
Fuzzy Cognitive Maps ◽  
Multi Criteria Decision Making ◽  
Decision Support Model ◽  
Productivity Improvement ◽  
Improvement Strategies ◽  
The Impact

Construction labor productivity (CLP) is affected by various interconnected factors, such as crew motivation and working conditions. Improved CLP can benefit a construction project in many ways, such as a shortened project life cycle and lowering project cost. However, budget, time, and resource restrictions force companies to select and implement only a limited number of CLP improvement strategies. Therefore, a research gap exists regarding methods for supporting the selection of CLP improvement strategies for a given project by quantifying the impact of strategies on CLP with respect to interrelationships among CLP factors. This paper proposes a decision support model that integrates fuzzy multi-criteria decision making with fuzzy cognitive maps to prioritize CLP improvement strategies based on their impact on CLP, causal relationships among CLP factors, and project characteristics. The proposed model was applied to determine CLP improvement strategies for concrete-pouring activities in building projects as an illustrative example. This study contributes to the body of knowledge by providing a systematic approach for selecting appropriate CLP improvement strategies based on interrelationships among the factors affecting CLP and the impact of such strategies on CLP. The results are expected to support construction practitioners with identifying effective improvement strategies to enhance CLP in their projects.

scholarly journals Judgement in geotechnical engineering practice

2021 ◽  
Vol 44 (2) ◽  
pp. 1-26
Author(s):  
José António Mateus de Brito
Keyword(s):  
Decision Making ◽  
Geotechnical Engineering ◽  
Lessons Learned ◽  
Engineering Practice ◽  
Informed Decision Making ◽  
Metro Station ◽  
Significant Damage ◽  
Professional Judgement ◽  
Construction Works

Professional judgement is the basis for many of the decisions taken by geotechnical engineers to make progress in the design, execution and works supervision. Judgment is a mandatory component of any engineering achievement, essential to assess the various uncertainties that inevitably affect engineering practice. Confidence in such judgements can result in small to big consequences, not only for the engineer itself, but also for others, sometimes with the risk of human loss and significant damage. The definition and the development of judgment in geotechnical engineering is discussed. The bases of the judgement are analysed in detail and the heuristics and bias, responsible for failures in the judgment, are identified. The importance of experts’ judgement and codification are highlighted and ways to improve judgment are also described. The lessons learned in a case study of one accident and two incidents that have occurred during the execution of the Lisbon Terreiro do Paço metro station construction works are presented to highlight the importance of an informed decision making informed through the engineering judgement.

scholarly journals Losses and Productivity Parameters for Cladding Technology with Wet-Process Sprayed Mortar

2018 ◽  
Vol 12 (1) ◽  
pp. 197-215
Author(s):  
Denise Ribeiro dos Santos ◽  
Gabriela Alves Tenório de Morais ◽  
Alberto Casado Lordsleem
Keyword(s):  
Best Practices ◽  
Production Management ◽  
Field Research ◽  
Second Step ◽  
Construction Companies ◽  
Wet Process ◽  
Fourth Step ◽  
Under Construction ◽  
And Control ◽  
Construction Works

Background and Objective:The wet-process sprayed mortar is a potential solution to minimize the traditional application negative points. However, its use is still incipient and a recent technological innovation in several regions of Brazil. Few available parameters that attest gains to subsidize the budget, design, and execution of cladding are systematized. This paper aims to evaluate the industrialized mortar loss and labor productivity in the execution of internal and external cladding for buildings.Methods:The first step was to define the elements to characterize the constructive cladding technology with mechanical projection of mortar and method for effective data collection. The second step consisted in the accomplishment of the field research, which took into account the case studies in 08 buildings under construction. The third step intended to describe the best practices highlighted in the construction works analyzed and the fourth step described the identification of actions able to succeed in the implementation and operation of the system.Result:The results allowed verifying industrialized mortar loss varying from 6.38% to 150.02%, as well as masons’ productivity from 0.18M’hr/m2up to 5.91M’hr/m2. The present research also made it possible to identify factors influencing the increase in the loss indicator, such as the fresh mortar consistency, failure in the transport and control of bagged materials, and high thicknesses in the cladding layer. As for the factors that favored productivity, it is important to highlight: the experience of the masons involved, the mortar application to the windows, and good logistics for the transportation of bagged goods.Conclusion:Identification of the best practices, opportunities to improve production management, and obtainment of quantitative references comprise the main contributions of this research, which may help in adoption of this technology and solution of similar problems by construction companies.

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