risk evaluation
Hossein Ghasemi; Ida Tayebian
Abstract
Purpose: The purpose of this study was to identify and analysis the human errors of control room operators of the second refinery of South Pars using the « hierarchical task analysis», «systematic human error reduction and prediction.Methodology: This study was conducted in the central ...
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Purpose: The purpose of this study was to identify and analysis the human errors of control room operators of the second refinery of South Pars using the « hierarchical task analysis», «systematic human error reduction and prediction.Methodology: This study was conducted in the central control room of the second refinery in South Pars, the necessary data was collected using SHERPA and HTA methods. A Hierarchical Task Analysis (HTA) was used in the first phase, and then, in the next step in order to the identification and assessment of the human errors, SHERPA method was performed.Findings: Of all the errors identified in the refinery (143 errors) from the analysis of SHERPA worksheets, 102 errors (71.33%) are related to functional errors, 35 errors (24.47%) are related to visit errors, 3 errors (2.1%) are related to Regarding communication errors, 3 errors (2.1%) related to retrieval errors and 0 errors (0%) related to selection errors were reported. Also, according to this study, 14% of the types of consequences caused by errors were very severe consequences. The most obvious errors were related to performance and visit errors. With regard to preventing and reducing the occurrence of each of the identified errors and limiting their consequences, suitable control measures were provided in the form of changes in equipment design, type of training, changes in work methods, revision, formulation and updating of work instructions.Originality/Value: in this regard, the present study investigates identify and analysis the human errors of control room operators of the second refinery of South Pars using the hierarchical task analysis, systematic human error reduction and prediction.
risk evaluation
Abouzar Kaffashi; ُS. A. Edalatpanah; Faezeh Nejati
Abstract
Purpose: in this paper discusse about the effect of three factors of project management and construction management and risk management on the time, cost and implementation process of projects in general and on a case-by-case basis with regard to building mass construction projects.Methodology: at the ...
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Purpose: in this paper discusse about the effect of three factors of project management and construction management and risk management on the time, cost and implementation process of projects in general and on a case-by-case basis with regard to building mass construction projects.Methodology: at the beginning and in the first part of the construction projects, construction, dam construction, tunnel construction, road construction, mass construction of buildings, high-rise construction were considered as options and based on 10 common criteria extracted for management. Project and construction management and risk management were ranked using the AHP method. Findings: According to the results, dam-tunnel-road construction projects were ranked first to third, respectively. for the three options related to construction projects, respectively, mass-building projects - high-rise construction, and finally, ordinary buildings are in the first to third ranks in the group of construction projects. Accordingly, mass building projects had the highest weight and was more important among construction projects. for conducting a case study, building mass construction projects of high, medium and low importance were considered as options and ranked according to the same criteria. The results showed that low-importance mass production projects were in the first place, followed by high and medium importance projects in the second and third ranks, respectivelyOriginality/Value: in the discussion of mass construction in the country, the best way is to build a building at a medium level.
risk evaluation
Meysam Kaviani; Mustafa Turk Lashkanari
Abstract
Purpose: The purpose of this study is to investigate the behavior of systematic, unsystematic and total risk in different life cycles of companies and seeks to answer the question whether the risk behavior of companies at different stages of the life cycle is different?Methodology: To answer the above ...
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Purpose: The purpose of this study is to investigate the behavior of systematic, unsystematic and total risk in different life cycles of companies and seeks to answer the question whether the risk behavior of companies at different stages of the life cycle is different?Methodology: To answer the above question, 153 companies in the Tehran capital market were selected by screening as a statistical sample. The data collected over an 8-year period between 2011 and 2018 is considered.Findings: The results of regression analysis show that unsystematic risk fluctuations in the introduction phase are more than the growth phase and also companies that face more cash flow fluctuations, in the introduction phase are faced with more unsystematic fluctuations than the growth phase. Finally, the results showed that companies in the introduction and decline stages do not face more total risk and market than the growth and maturity stage.Originality/Value: This article evaluates the risk behavior under different life cycles of companies with a corporate risk management approach.
