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This study aims to scrutiny the performance of the petrochemical sector and the technological innovation life cycle. Also, the stage of the innovation life cycle for the sector is specified. Then, scenarios are designed to improve the speed of the sector development. For this reason, for synchronizing the petrochemical sector, this study tries to combine two innovation systems (technological and sectoral systems) called “techno-sectoral innovation system” under an integrated model. Furthermore, the “functions and driving motors” are expanded in the proposed model.

By combining two concepts of the innovation systems, the complexity of the system rises to some extent. Also, to model causal relationships in the sector and non-linear connections between variables, system dynamics approach is applied. During this phase, the flow diagram of the model is translated to a simulation programme using Vensim software. Model validation is investigated using a comparison of the actual with simulated values.

The results predict the functions state of the innovation system and detect activation of innovation motors in each stage of the innovation life cycle. Validation shows the acceptable error of the indices. It can be concluded that the sector is relatively in the development state. Four scenarios have been proposed for representing policies that sector uses to motivate its companies. The best scenario is the fourth one that divides resources with different weightings among companies to accelerate switching time between sector’s motors. Finally, the fourth scenario can improve the performance of the petrochemical.

The hybrid approach shows researchers that performance of an industry can be improved based on sectoral and technological at the same time. Thus, this case-based model can contribute to other researchers, as a base model. Also, it could be customized with parameters and the relationship between players and functions. Furthermore, a dynamic switch among the motors has been presented in the model.

The purpose of this paper is to model the relationship between “innovation systems” players and markets to indicate the “innovation functions” behavior during the petrochemical technology life cycle.

In a general classification, innovation systems are divided into four categories: technical, sectoral, regional and national. If two approaches are hybrid, their benefits would be combined. According to the sectoral structure of the governance model in Iran, in many sectors, such as petrochemical technology, the combination of one another with a sectoral approach is essential. Hence, this paper has introduced a new hybrid approach, called a techno-sectoral innovation system, and has used system dynamics as a methodology and a petrochemical industry as a case study.

The results predict the functions state of the innovation system and detect activation of innovation motors in each stage of innovation life cycle. Validation is investigated using Monte Carlo simulation that shows the error of the indices is acceptable. It can be concluded that the model is relatively in a development state and the motor of entrepreneurship functions.

This case-based model can help other researchers, as a generic model. It could be customized with the input parameters and relational flows of new cases, and functions (F1-F7) can show the result of each scenario made by the innovation analyst and the policymaker.

Reliable operation of natural gas pipeline (NGP) is a critical factor in Iran’s economic development. NGP projects go through different ecosystems and considerably affect the environment. Environmental analysis is an essential step toward sustainable development. Tackling the challenges, this paper aims to develop a framework to systematically assess the environmental impact of NGPs.

This study proposes a comprehensive framework for environmental impact analysis of NGPs using Measuring Attractiveness by a Categorical-Based Evaluation Technique (MACBETH). MACBETH protocol is used to calculate the overall environmental scores of projects.

The results indicate that the impact of implementing NGPs on protected areas is of the highest priority, while the impact on vegetation covers is of least priority for assessing the environmental impact of NGP.

The practicality and validity of the model in the case of three candidate routes for the Polkale-Neizar project in Iran are examined. According to the results, the third alternative is selected based on its non-interference in protected areas and less environmental impacts. The proposed model can be modified and applied to perform environment appraisal of other linear projects such as energy, road and railway networks.

This model addresses a range of environmental impacts of implementing NGPs at two levels, with the second level being non-additive. The novelty of this study translates into considering the qualitative and quantitative features of each evaluation criterion applied to linear projects simultaneously using a multi-criteria value measurement.

The purpose of this paper is to analyze strengths, weaknesses, opportunities and threats (SWOT) of energy efficiency improvement of Iran building sector and develop strategies based on them and finally prioritize these strategies according to experts’ judgments. This SWOT analysis is developed based on a detailed study in Iran energy market along with consulting with several energy specialists and has not been conducted before.

Since SWOT analysis is not capable to rank the developed strategies, analytical network process method is applied to prioritize them according to experts’ judgments. Results are compared with the results of the hierarchical network process (AHP).

Numerical results show that modification of the energy tariff system is the most important strategy. Besides this strategy, four other ones are related to the role of government in Iran energy market, while the remaining ones can be accomplished by domestic or international companies. They are about worn out appliances, inefficient buildings and inefficient lighting systems.

The SWOT analysis and the developed strategies can provide an insight into the improvement of buildings’ energy efficiency in Iran and some similar countries. All the developed strategies have two sides. One is the regulatory and supporting role of the government and the other is about the investment and implementation considerations. As most of the required rules have been established, the ground is prepared for domestic or international investors to start or develop their energy-related businesses in Iran market.