Journal of Occupational Hygiene Engineering

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Identification of factors affecting safety culture in Iranian thermal power plants

Rahim Goodarzi, Shirazeh Arghami, Mostafa Pouyakian,
Volume 3, Issue 2 (Summer 2016)

Abstract

Introduction: safety culture is a term which is used repeatedly in the assessment of safety status of companies. The aim of present study was to investigate the parameters and factors influencing organizational safety culture in the Iranian thermal power plants industry.

Method: Triangulation approach was used for data generation in this grounded theory study. Nineteen participants from a variety of work groups at three thermal power plants of Iran (Shazand, Shahid rajaei Ghazvin and ramin Ahwaz) took part in focus group interviews, individual interviews, field observations, and focus group discussions. Thematic analysis was conducted to emerge and identify the contributing factors.

Results: The thematic analysis identified 9 sets of parameters in achieving the safety culture as follows: (1) training, briefing and competency (2) vision, leadership and commitment (3) lows, rules and work procedures (4) safety and crisis management (5) individual agents (6) Management style and organizational communication (7) participation and commitment of personnel, supervisors and middle managements. (8) Non organizational agents (9) to make available of foundations and source managements

Conclusion: The results indicated that an improvement in each parameter is necessary to achieve top safety culture. Moreover, proportionate to the conditions of each company in the periods set, should be taken for the betterment actions of safety status and accomplishing pre-determined targets.

A Systematic Control Model for Covid-19 Outbreak from a Safety Engineering Perspective

Dr. Mostafa Pouyakian,
Volume 7, Issue 2 (Summer 2020)

Abstract

There is a need for a systematic approach to reduce the consequences of the coronavirus disease-2019 (Covid-19) outbreak. The most effective way to prevent this disease is to cut off the virus transmission chain. This study aimed to propose a systematic model for the management of the Covid-19 crisis based on the bow-tie analysis model and the concept of Layers of Protection Analysis from the perspective of safety engineering. In this model, five layers of defense have been introduced to reduce the patient's referral to the hospitals and effectively manage the disease transmission chain. In addition to maintaining the health of citizens, the implementation of this model will improve the health of healthcare workers by reducing the burden of patient admission to hospitals

The Reliability Assessment of Firefighting Systems Using Fuzzy Bayesian Network in the Floating Roof Tanks of a Petrochemical Company

Fereydoon Laal, Mostafa Pouyakian, Mohammad Javad Jafari,
Volume 10, Issue 1 (Spring 2023)

Abstract

Background and Objective: This study aimed to provide a risk assessment method based on a Fuzzy Bayesian Network (FBN) to prevent the failure of firefighting systems (FSs).
Materials and Methods: In this research, the fault tree structure was validated, and the failure factors were identified. Triangular fuzzy numbers and the combined CoA/Sum-Product method were used to calculate the failure rate. Subsequently, deductive and inductive reasoning, as well as sensitivity analysis were performed using fuzzy logic and fault tree transmission in a Bayesian Network (BN).
Results: The results of a case study on methanol storage tanks showed that the combination of FBN and validation of structures can be presented as a suitable method to evaluate the reliability of FSs. The content validity index of the final basic events was over 0.79. The highest and lowest failure rates were related to the foam system and valve, respectively. Moreover, the failure rate for the failure of FSs was 5.7×10^-6 based on the fuzzy fault tree (FFT). After updating with BN, the previous rate of failure of FSs with FBN was calculated to be 0.022978, which was greater than the value of the FFT. The reliability of the system was equal to 0.77022.
Conclusion: The present approach can help the decision-making process of managers and analysts of the petrochemical industry to prevent the failure of FSs in tanks due to changes in systems.

Investigating the Relationship between Safety and Organizational Culture in the Production Line Employees of One of the Automobile Companies

Zahra Gholi, Mehran Ghalenoei, Davod Kermani, Mostafa Pouyakian,
Volume 10, Issue 3 (Autumn 2023)

Abstract

Background and Objective: Safety activities focus on reducing workplace risks, and very few activities focus on increasing organizational and safety culture. The purpose of this study was to investigate the relationship between organizational culture and safety at one of the largest automobile companies in the country.
Materials and Methods: The current research was a correlational study that was conducted at a specific point in time. The statistical population of this research was the employees of paint and body salons of an automobile company. In total, 402 people were selected using the limited population sampling formula. The data collection tool, which was a questionnaire, had three sections, including demographic characteristics, organizational culture, and employee safety culture. In order to investigate organizational culture, a 29-question questionnaire based on the 10 indicators of the Robbins model was used, and for organizational culture, a 37-question organizational culture questionnaire was used.
Results: The average age of the participants was 36.06±4.72 years, and the average organizational culture score in this industrial unit was 84.03±18.45. The correlation test showed the relationship between organizational culture and safety culture to be 0.652 and significant (P<0.001). In addition, 69.6% of observations were unsafe, and 30.4% were safe. No statistically significant relationship was found between unsafe behavior and demographic variables, except for age and work experience.
Conclusion: There was a significant relationship between safety and organizational culture, and individual factors and management factors had the greatest impact on safety culture. Safety culture, as a part of the organizational culture structure in organizations and industries, focuses on occupational health and safety issues. Giving importance to the safety culture or any change in the work culture and attitude of the employees can help overcome the obstacles in the way of safety in the workplace.

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