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Revisions policy

Principle T3.9 of the Code of Practice for Statistics states that scheduled revisions or unscheduled corrections to the statistics and data should be released as soon as practicable. The changes should be handled transparently in line with a published policy.

This policy relates specifically to official statistics published under the HESA brand. The revisions policy with respect to other Jisc published statistics is currently under review and will be published in due course. 

Read the full Code of Practice

  1. Jisc aims to avoid the need for revisions to statistical releases unless these are absolutely necessary. Jisc statistical releases are published in final form only, without provisional release stages. These are not subject to any scheduled revisions.
  2. Revisions to Jisc statistical releases can arise only as a result of errors in Jisc's data collection or production processes.
  3. Jisc operates an annual data collection process that includes provision for HE providers to correct errors identified in data previously submitted to Jisc in controlled circumstances (errors are judged to be significant in impact and corrective actions approved by the relevant UK HE Funding Body). Where any Jisc data release includes time series, the time series will use the most up-to-date copy of those data held by Jisc at the time of release preparation (i.e. incorporating corrections made after first submission to Jisc). As a result time series figures may differ from previous published data releases.


  4. Whilst Jisc operates robust statistical production and quality assurance procedures we recognise that errors occasionally arise. When errors in statistical releases are identified Jisc will take the following course of action:
    1. A rapid assessment will be undertaken of the materiality of the error to users' interpretation of the statistics.
    2. If deemed to be material, users of the output will be informed promptly via direct contact where contact details of specific users are known or via the relevant electronic publication medium (usually the HESA website The error will be corrected as soon as possible by a re-issue of the release. Subsequent editions of the statistical release may also make reference to the error to ensure that any users wishing to undertake comparisons between successive editions are fully aware.
    3. If deemed not to be material, details of the error are logged to ensure that there is no repetition of the error in subsequent editions of the statistical output.
    4. Material errors are fully investigated by Jisc. A thorough analysis is taken into the cause of the error, together with an assessment of impact and list of corrective actions to minimise the risk of any repetition.