Bibliometrics are quantitative measures that provide just one part of the picture. Ideally they should be used in conjunction with other data such as funding received, number of patents, awards granted and peer review.
Some Limitations of Bibliometrics:
- Quality: high citation counts may not necessarily indicate quality.
- Differences between discipline's: some research fields cite papers more than others. You need to compare like with like !
- Early Career Researchers may not fare so well. You need to take stage of career into account. Altmetrics may be useful here.
- Data coverage varies: the tools used to gather bibliometric data do not cover all research areas or index all publications. The results will vary depending on the tool you use.
For more check out these source's: