جستجوی مقالات مرتبط با کلیدواژه "fmea" در نشریات گروه "عمران"

Part of the success in the implementation of policies depends on the policy implementation capacity, because the capacity is the result of the ability to shape the future. This research has identified the effective factors in improving the capacity of policy implementation and the cause and effect relationship between them. The research communities in this applied research consist of 12 policy experts and experts of the highway organization, who were selected through non-random and purposeful sampling. Data collection tools, interviews and questionnaires, and FMEA and Fuzzy Dimetal techniques were used for data analysis. The reconstruction of the structure of the organization and management in formulating and implementing the policies of the road organization has the most and the index of improving the education and participation system in connection with the road organization has the least effect on other indicators of improving the capacity of implementing these policies. The effort to improve the capacity to implement the policies of the road organization should be accompanied by planning and constructive and sustainable changes in the structure of the organization and management and with efficiency and effectiveness in the reconstruction of the structure of the organization and management in formulating and implementing the policies of the country's road organization. It will strengthen other indicators. The principled and realistic formulation of the organization's policies can provide a basis for improving the capacity of implementing the policies of the highway organization.

A power plant can be considered a workplace with a high level of risk.For this reason in order to ensure sustainable Performance in Power Plants risk management is essential.  In this study the AHP method for Classification of risks And the FMEA method for risk Rating and SAW method was used to rank the risks. Finally, the ranking was done by FMEA&SAW method.According to the result s of the AHP method among the main Criteria the highest weight is related to un expected events with a weight of /403.The results of FMEA method showed that the risk of explosion and fire with 600 RPN is at an unbearable risk level. In the ranking with SAW method Also explosions and fires, earthquakes, lightning and human error they were in the first priorities of this ranking. Also risk Prioritization with FMEA&SAW integrated model also showed that the risks of explosion and fire*earthquake*human error*lightning and system defects are in the top 5 Priorities ranking.So we can say using this method provides amore accurate analysis of first.As a result more efficient actions will be in herited and will achieve and maintain amore desirable degree of confidence.

Nowadays, there is risk in all aspects of life and construction projects are not excluded of this rule. Existence of risks and uncertainties in different stages of work is the main reason for the project's failure to achieve its predetermined goals. Project risk management is the science of identifying, analyzing, and responding to risk over the life of a project that is used to reduce or eliminate the likelihood or effects of adverse outcomes on project time, cost, and quality targets. The FMEA technique is one of the methods of determining the value of risk that not only identifies the errors and defects that are hidden and obvious in the system and process, but also searches to reduce or eliminate them by taking the correct preventive measures. To analyze the risks in construction projects, we are faced with uncertainties such as ambiguity, and fuzzy theory provides the necessary mathematical tools to deal with vague and ambiguous data. Accordingly, in this study, a model consisting of seven basic steps based on the combination of FMEA technique and fuzzy logic was proposed. The risks in construction projects were identified with the help of previous studies and researches and the effective parameters on the risks were quantified by experts. By calculating the risk priority number, the risks were ranked. In addition, a method for calculating and mapping the level of risks was introduced, which identifies not only critical risks but also all high-risk components of the project risk Breakdown structure. Also, in order to reduce or eliminate the negative consequences of high-priority risks, corrective measures were investigated in the research.

Recently a noticeable increase in road accidents related to buses has been reported. Of course, a comprehensive survey of these tragic events that has led to the death of a large number of our beloved countrymen is a duty as human being. FMEA method as an updated method in risk analysis can be useful for possible reduction in similar incidents. This research has been conducted with collaboration of experienced engineers group in Oghab Afshan Industrial Co. (The manufacturer of Scania buses in Iran), that has been directly affected from accidents relating to Scania buses in recent years. It should be mentioned that Scania buses are the main proportion of the Iran's active road transportation. This study represents a new application of FMEA, Crash FMEA, with some modification in table of risk elements to provide the fastest actions faced with several accidental factors that will be helpful in buses road accidents. Certainly, ranking these accidental factors and focusing more on the factors with higher ratings, would be an efficient and effective action in the shortest possible time to reduce life casualties. The results of this research project include actions that are required to carry out by driver, after sales service centers and Traffic Police. With the prioritization and implementation of preventive measures, we can see a dramatic reduction in buses road accidents with the lowest cost and fastest possible time.

Monitoring and evaluation are of utmost importance, so that without the creation of a coherent and well-established system, will not have a remarkable efficiency. These oversights are targeted to improve and promote the projects / plan execution quality in the organization while utilize the knowledge and experience of specialists in enhancing the researchers’ activity. Today, the construction sector is encountered many disruptions including low quality constructed buildings. In order to cover the technical inspection services of the building, there is a specific oversight on construction, based on rules and regulations on building subjects. However, due to the number of decision-making centers on building standards such as Construction Engineering Organization, Institute of Standards and Industrial Research, Municipality, and the Ministry of Roads and Urban Development, the supervision and technical inspection of the building sector are in difficulty. In this research, firstly, FMEA method will be used to identify and prioritize the factors affecting the monitoring difficulties in the construction projects of Iran. Then, in order to prevent these problems from occurring in the country's construction projects, some course of actions are presented.

Bridges with each structural shape and with every kind of materials that are made, soon or late, fatigue effects are appeared in them, among kind and rate of these fatigues and their expansion trend, numerous factors are effective such as climate situation, flood or earthquake occurrence, load increase more than design rate, design qualification and performance and kind of materials. If each of these factors are not considered leads to decrease of useful life in structure. In this research after doing investigations by using FMEA-FUZZY method, it became clear that earthquake is known as the main and the most effective factor of bridges ruin in utilization case. For this reason, imposed earthquake on Babolsar bridges was strictly investigated and after bridges modeling in SAP software, probability of ruination in each structural element of bridges was calculated. Then, by using FMEA-FUZZY method, rate of risk in each bridge against earthquake becomes clear. Difference of presented procedure in this research with previous research is that by using this procedure it is possible to correct the situation of all bridges by budget similar to previous cases. And reaching to relatively proper case, while in previous researches, by using multi-criterion decision making method, we only selected a bridge as a critical bridge that was in most critical case and all budget was spend first for this bridge and then was spend for other bridges. The results show that each of bridges in which parameters has debility. So, it is necessary to do all schemes for resisting these bridges against earthquake and to prevent from probable difficulties, caused by earthquake on these bridges. Finally the result show that steel legs buckling at the first bridge and the second is necessary for reform.