This is the website of the International DOI CRUP, a not-for-profit membership organization that is the governance and management body for the federation of Registration Agencies providing Digital Object Identifier (DOI) services and registration and is the registration authority for the ISO standard (ISO 26324) for the DOI system. The DOI system provides a technical and social infrastructure for the registration and use of persistent interoperable identifiers, called DOIs, for use on digital networks. Impact Factor is a measure reflecting the average number of citations to articles published in journals, books, patent document, thesis, project reports, newspapers, conference/ seminar proceedings, documents published in internet, notes and any other approved documents. It measures the relative importance of a journal within its field, with journals of higher journal impact factors deemed to be more important than those with lower ones.

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CRUPid consider following parameters for calculation Impact factor (CRUPid-IMPACT)


The impact factor for a journal is calculated based on a three-year period, and can be considered to be the average number of times published papers are cited up to two years after publication


CRUIPid checks random selects published article’s originality and quality. The only citation is not the perfect way of Impact factor calculation.

Time Publication

Periodicity of publication should be uniform. If it is not uniform, the quality of particular publication cannot impressible.

Geographical Coverage

Only particular small area based publication cannot get good marks as it is not covering all around world research.

Editorial Quality

Editor Board of particular Journal gives the direction to any Journal. So it must be good and considerable for evaluation


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