Data Sources and Metrics
The 5th edition of the Research.com Best Engineering and Technology Scientists in Spain Ranking is primarily derived from comprehensive bibliometric data gathered from leading sources including OpenAlex and CrossRef, supplemented by multiple other authoritative bibliometric databases. The citation-based metrics utilized to construct the ranking were collected on January 12, 2026, ensuring up-to-date and relevant data. Each scientist’s position in the ranking is determined by their D-index (Discipline H-index), a specialized metric that considers only the publications and citation impact within the specific discipline under review—in this case, Engineering and Technology. This discipline-focused approach allows for a more precise and contextualized evaluation of research contributions.
Scope of Research Examined
For the construction of this ranking, a total of 279,971 scientist profiles were examined across all disciplines from an extensive range of bibliometric data sources. Out of these, 229 scientists specifically affiliated with the Engineering and Technology discipline were evaluated. To qualify for inclusion in the ranking, a scientist’s D-index had to be at least 30, with the majority of their tier publications categorized within the Engineering and Technology area. Additionally, consideration was given to their awards and notable achievements in this field.
The threshold for the D-index is calibrated in increments of 10, reflecting the total number of scholars estimated per discipline, while ensuring representation of the top 1% of leading researchers within each field. Moreover, eligibility criteria include that the proximity between a researcher’s general H-index and their D-index must be 30% or less, reinforcing discipline-specific excellence without disproportionately favoring general research impact.
Additional Verification Practices
Recognizing the limitations inherent in relying solely on raw bibliometric data, the researchers behind this ranking undertook rigorous manual verification of all scientist profiles. This validation process involved cross-correlating each profile against publications indexed in a wide range of trustworthy sources to ensure accuracy and authenticity. Although the number of papers published in prestigious journals and major conference proceedings does not directly influence a researcher's ranking position, it serves as a valuable secondary indicator of their scientific contribution within Engineering and Technology.
The position of each researcher is ultimately established using their D-index as calculated from data sourced primarily from OpenAlex and CrossRef—two of the most prominent and respected bibliometric databases accessible to the research community. For a detailed understanding of the methodology and verification protocols employed, readers are encouraged to visit our methodology page.
The Research.com Agenda
At Research.com, our mission is to inspire researchers, industry leaders, and policymakers worldwide to gain insight into the trajectories of leading experts. By providing a transparent and meticulously developed ranking, we aim to facilitate the global scientific community’s ability to identify key thought leaders within distinct areas of study, whether by country, discipline, or research institution. This transparency drives informed decisions and strategic investments in science and technology, enhancing collaboration and advancing innovation globally.
