Bibliometric data for devising the citation-based metrics employed in the ranking were collected as of January 12, 2026. The position of each scientist in the ranking is established based on their D-index (Discipline H-index), a metric that takes into account only those publications and citation metrics relevant to the examined discipline, in this case, Engineering and Technology. This approach ensures a focused and fair evaluation of research impact within a specific field rather than across unrelated disciplines.
Scope of Research and Qualification Criteria
The ranking is grounded on a thorough examination of 279,971 scientist profiles identified from a wide array of bibliometric data sources encompassing all disciplines globally. Specifically, for the domain of Engineering and Technology, 1,234 scientists were analyzed. To qualify for inclusion in the ranking, a scientist’s D-index had to meet a minimum threshold of 30, reflecting a sustained impact within the discipline.
Additionally, a majority of a qualifying scientist’s tier publications had to be directly related to Engineering and Technology, ensuring relevance of their contributions to this specific field. Besides quantitative bibliometric criteria, scientist awards and notable achievements within the domain were carefully considered as important qualitative indicators of excellence.
The D-index threshold is set as an increment of 10 relative to the estimated total number of scholars within each discipline, calibrated so that the top 1% of leading scholars are reliably incorporated into the ranking. Moreover, a proximity criterion stipulates that the difference between a scientist’s general H-index and their D-index should not exceed 30%, thereby affirming the disciplinary focus without disregarding overall research impact.
Verification and Validation Practices
We fully acknowledge that raw bibliometric data alone cannot be an absolute measure of scholarly output and impact. Accordingly, all scientist profiles included in the ranking were subjected to meticulous manual verification procedures. This involved cross-correlation against publications from a broad spectrum of trustworthy sources to validate the authenticity and relevance of the data collected.
While the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s rank, it serves as a valuable secondary indicator of their contribution to advancing research in Engineering and Technology.
To reiterate, the position of scientists in this ranking is determined using the D-index metric calculated from data obtained from OpenAlex and CrossRef, reinforcing the credibility of the evaluation framework. Readers interested in a detailed explanation of the methodology are encouraged to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, corporate entities, and policymakers around the world to discern and understand the trajectories of leading experts. This ranking provides a reliable and transparent platform for the international scientific community to recognize who the foremost researchers are within specific fields of study, whether by country or within research institutions.
Through rigorous data collection, verification, and sophisticated metrics such as the D-index, Research.com is dedicated to fostering a culture of excellence and informed decision-making across the global research ecosystem.
