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This article proposes a novel hybrid simulation model for understanding the complex tobacco use behavior.

The model is developed by embedding the concept of the multistage learning-based fuzzy cognitive map (FCM) into the agent-based model (ABM) in order to benefit from advantageous of each methodology. The ABM is used to represent individual level behaviors while the FCM is used as a decision support mechanism for individuals. In this study, socio-demographic characteristics of individuals, tobacco control policies, and social network effect are taken into account to reflect the current tobacco use system of Turkey. The effects of plain package and COVID-19 on tobacco use behaviors of individuals are also searched under different scenarios.

The findings indicate that the proposed model provides promising results for representing the mental models of agents. Besides, the scenario analyses help to observe the possible reactions of people to new conditions according to characteristics.

The proposed method combined ABM and FCM with a multi-stage learning phases for modeling a complex and dynamic social problem as close as real life. It is expected to contribute for both ABM and tobacco use literature.

It is crucial to transform current enterprises to greener versions of them to reach the sustainable development goals. The first step of this transformation can be understanding comprehensively environmental performances of enterprises. This study presents a practical analysis for evaluation of factors affecting environmental performance of enterprises to call them as a “dark green.”

For this purpose, a detailed factor search was primarily performed and then the weights of them on environmental performance of the enterprises to support sustainable development were analyzed using fuzzy cognitive map (FCM) that incorporates the casual relationships between factors and represents the dynamics of the complex systems. The FCM was also supported with extended great deluge algorithm (EGDA), which is an evolutionary algorithm with high performance to increase robustness of the study.

The findings indicated that the most influential factors on environmental performance of an activist enterprise are “loyalty to regulations,” “digitalization level,” “tendency to produce environmentally friendly products/services,” “productivity efforts” and “fossil fuel consumption,” respectively. While the first four of them affect the environmental performance positively, fossil fuel consumption affects it negatively.

The results of this study can help companies to prioritize the critical points for their environmental perspectives, observe at which factors they are good or lacking and find where to start improvement.

This study is one of the pioneering studies to investigate the importance of criteria for a dark green business, considering 21 factors from different sources to make a detailed representation of corporate environmental sustainability.

The COVID-19 pandemic has proven that how supply chain management (SCM) can become a crucial process for sustainability of the world's production/service. The global supply chain crisis during pandemic has affected most of the sectors. Home and personal care products manufacturers are among them. In this study (1) the problems at SCM of personal and home care products manufacturers during pandemic are discussed with the help of medium-size manufacturer and (2) the factors affecting suppliers' performance for the relevant sector during COVID-19 are analyzed comprehensively.

The importance of the factors is evaluated using fuzzy cognitive maps that can help to reveal hidden casual relationships with the help of expert knowledge. In order to eliminate subjectivity due to usage of expert knowledge, the maps are trained with a hybrid learning approach that consists of Non-linear Learning and Extended Great Deluge Algorithms to increase robustness of the analysis.

The findings of the study indicate that the factors such as general quality level of products/services, compliance to delivery time, communication skills and total production capacity of suppliers have been crucial factors during pandemic.

While the implementation of the hybrid learning approach on supply chain can fill the gap in the relevant literature, the promising results of the study can prove the convenience of the methodology to model the of complex systems like supply chain processes.