Bibliometric indicators

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First generation indicators

P	Number of papers published.
C	Number of citations to these papers. May be counted with or without self-citations.
CPP	Average number of citations per paper
JIF	Journal Impact Factor, a measure of the average number of citations per papers in a specific journal. Used by Thomson Reuter to select the journals indexed for Web of Science, but also widely used as a quality indicator for journals and (indirectly) for papers published in these journals.

First-generation indicators do not take account of the large differences in publication and citation patterns between different subject areas - or of the variations in subject coverage by the databases used for publication and citation counting. To solve this problem a number of slightly more sophisticated indicators have been designed:

Second generation indicators

CPP/FCSm	The "Crown indicator". Citations per publication, compared to papers published in the same year and in the same subject field (mean Field Citation Score)
CPP/JCSm	Citations per publication, compared to papers published in the same year and in the same journal (mean Journal Citation Score).
JCSm/FCSm	The Journal Citation Score divided with the Field Citation Score measures the "quality" or impact of the journals in which a person or a group does publish.
NtopX	Number of papers among the X% most cited papers in a field (where X usually is 1, 5, 10 or 20).
PtopX	Percentage of papers among the X% most cited papers in a field.

Metrics for assessments - a proposal

An organization should never be evaluated on the basis of a single indicator. A multi-dimensional approach is to be preferred. A suitable "ensemble" of indicators might include:

a productivity measure (number of publications, perhaps also publications per professor)
an "average quality" measure, e g CPP/FCSm
a "top quality" measure, e g Ptop1% and Ptop5%
a "journal quality" measure, e g JCSm/FCSm