Resource Allocation

Prioritisation of proposals

After the technical and scientific review steps, the proposals, reviews and replies from the applicants are used by the PRACE Access Committee to rank them according to scientific and technical excellence.

The PRACE Access Committee is composed of eminent scientists from across the remit of the PRACE scientific applications. Its members are selected annually by the PRACE Scientific Steering Committee. The composition of the PRACE Access Committee is available here.

The Access Committee will analyse the proposal, the technical and scientific review reports together with any applicants’ response, in order to produce a single ranked list for each call of proposals that have been sent to the Committee. Multi-Year and Single-Year Project Access proposals are ranked in the same list. The Committee takes into account the advice of the technical and scientific assessments regarding amounts of resources requested or desirable for each proposal in making its recommendation on the resources to be allocated to each proposal.


Preparatory Access

Proposals for Preparatory Access only undergo technical assessment. Applicants will be promptly informed about the outcome of their application. The allocated resources are based on the recommendations of the technical reviewers regarding resources required for the proposed activity and available resources, and may differ from those requested. If expert support has been requested, applicants will be contacted by the assigned expert.

Project Access

Allocation of resources to proposals for Project Access will follow the prioritization of the PRACE Access Committee. Resources will be allocated by the Board of Directors of PRACE until they are exhausted, or until the list of proposals deemed of sufficient quality by the PRACE Access Committee is exhausted. The applicants will be promptly informed if their proposal has been successful or not. They will also be informed of the amount of resources that they have been awarded, which may have been modified by the PRACE Access Committee or the Board of Directors of PRACE.

Changes and extensions to awards

Applicants must inform PRACE promptly of any changes to a successful proposal, either regarding the amount of resources needed or the distribution of the usage time within the schedule. Requests for the extension of the allocation period need to be fully justified and will be analyzed by PRACE on a case by case basis. Extension will only be considered in the event of unforeseen technical issues at the HPC hosting site which would prevent the user from accessing the awarded HPC resources. The awarded resources (total computer time and/or expert support) cannot be increased. All notifications of changes or requests for extensions should be sent to peer-review[at]

Applicants right to appeal

All PRACE allocation/rejection decisions are final. Nevertheless, applicants that have concerns about the review of their applications should contact via email the PRACE Peer Review Team peer-review[at] within two weeks after receiving the decision. The PRACE peer review staff will respond by providing clarifying information as needed about the peer review process and the PRACE final decision.

Please only contact the PRACE peer review staff if it is not clear, from the reviewers’ comments, where the flaws in the proposal were. High quality proposals may not be allocated resources because of resources limitations.

If, following clarifications from the PRACE peer review staff, the applicant still has concerns about procedural aspects of the review, a formal letter of appeal can be submitted via email to the PRACE BoD bod[at] no later than one month after receiving the clarifications from the peer review staff. The PRACE BoD will analyze the applicant’s reasons for complaint on a per case basis and will send a formal reply to the applicant within one month of receiving the appeal.