Resource Allocation


Prioritisation of proposals


After technical and scientific assessments proposals are forwarded to the PRACE Access Committee that makes a recommendation for resource allocation to the PRACE Board of Directors. The Access Committee seeks to allocate available resources to the scientifically most excellent proposals.

The Access Committee is composed of eminent scientists from across the remit of the PRACE scientific applications. The members will primarily be selected from PRACE partner countries, but scientist from other countries may also be chosen if deemed necessary or desirable. The composition of the Access Committee is available here.

The Access Committee will analyse the technical and scientific review reports together with any applicants’ response in producing a single ranked list for each call of proposals that have been sent to the Committee. Multi-year and 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 to the Board of Directors on the resources to be allocated to each proposal.

The Access Committee prepares the ranked list in a face-to-face meeting organized in two phases. In the first phase, subpanels from different areas of science are created for every call and rank the applications within their respective areas. The subpanels are chaired by one or two experts of the Access Committee, and a number of 5-6 experts are invited to perform the prioritization. In the second phase, the different prioritized lists are merged in a single list, with the participation of all members of the Access Committee, and inviting the experts of the subpanels of the different areas.




1. Preparatory Access

Proposals for Preparatory Access only undergo technical assessment. This assessment is forwarded to the Board of Directors that makes the decision of allocations. 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, available resources and the Board of Directors prioritization, and may differ from those requested. If expert support has been requested, applicants will be contacted by the assigned expert.

2. Multi-year and Project Access

For Multi-year and Project Access, the Access Committee will recommend resource allocations to the Board of Directors. PRACE will allocate resources in rank order of scientific excellence until available resources are exhausted, or the list of proposals deemed of sufficient quality for resource allocation has been 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 altered by the Access Committee or the Board of Directors).

3. 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.

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