Knowing what material impact an event may have on stakeholders is crucial for establishing an open and lasting relationship. It enables our stakeholders to evaluate our degree of commitment to sustainability, and we can focus our efforts on responding in a manner consistent with their needs, based on our business strategies, mission and values.

To determine the material aspects and their most significant impacts, we had a study performed by an independent firm four years ago. In 2013, this study was updated internally taking into account the essential aspects of our business strategy, the issues specific to our industry, the markets in which we participate, laws and regulations that affect us, the possible risks, social expectations and issues stressed by our stakeholders.

All aspects that reflect the significant economic, environmental and social impacts of the organization, as well as aspects that significantly influence the perceptions and decisions of our stakeholders.

Competition in our industry and in the markets where we participate, opportunities for innovation and economic growth.

Risks and opportunities:
Environmental, economic and social impacts, risks and opportunities

Business Strategy:
Constant adaptation to changes in a complex environment in order to ensure the viability and long-term sustainability of the company, innovation, and the social value of our services.

Global Environment:
International trends demanding the integration of social and environmental criteria into infrastructure projects.

Global Reporting Initiative (GRI):
Abiding by GRI indicators, the Dow Jones and BMV Sustainability Indices, and the Global Compact, have enabled us to focus our information on the most relevant aspects of our activities in the pursuit of sustainability, and disclose information consistently with internationally supported standards.

Based on a materiality analysis we identified those subjects that have the greatest impact on our stakeholders and our operations, as shown in the following table of social expectations and issues stressed by our stakeholders:

1. Economic Impact and market presence: Seeking healthy financial performance for our business, taking into account factors such as the need for infrastructure in the nation and around the world, growth, construction system efficiency and quality.

2. Strategy and Analysis:Having appropriate strategic planning, risk management and management systems.

3. Transparency and legal compliance: Guaranteeing ethical business practices through good corporate governance, with accountability that includes issues such as transparency, money laundering and corruption.

4. Occupational health & safety: Developing a security system that promotes each employee's commitment to leadership in the area of safety, and programs that continually improve our safety performance.

5. Unions / Collective bargaining. : Unionism in Mexico has been transformed to involve social, economic and governability aspects in the country as a whole, obliging our company to modify past paradigmatic practices in labor and transport.

6. Job generation: Linked with project generation; since new projects generate jobs and support the goal of employability, a virtuous and mutually beneficial circle is created.

7. Local Communities:Monitoring the positive and negative impacts, whether real or potential, of our operations; creating economic opportunities for communities by hiring local personnel and suppliers, therefore improving their quality of life.

8. Training/education/development: Developing human capital programs for our employees, and social responsibility programs for the communities surrounding our projects and society at large, through alliances with local communities schools, government organizations and higher educational institutions.

9. Environmental remediation and biodiversity : Identifying and respecting areas of high biodiversity and integrating biodiversity considerations into our activities; protecting and restoring habitats that support endangered species in the zones where we operate.

10. Supply chain management: Relations with suppliers; environmental sustainability of the supply chain; sustainable materials; human rights in the supply chain.

11. Dialogue with stakeholders: Building strong relations with stakeholders based on mutual trust and respect.

12. Innovation: Innovation management.