CERN Accelerating science

Memorandum of Understanding

Collaboration with WLCG is typically formalised through negotiating and signing a Memorandum of Understanding (MoU).

MoUs put in place formal partnerships, describing the legal framework and agreements for involvement in WLCG, plus the annexes which are regularly updated according to pledges delivered by the collaborating institutions.

To discuss partnership opportunities and all advantages of collaboration with WLCG, please contact us at

Sample MoU

The document here is a sample MoU. Please note that the annexes in the sample will not be up-to-date due to continually evolving data. For up-to-date annexes, please see the Annexes section further below this page.

Memorandum of Understanding for Collaboration in the Deployment and Exploitation of the Worldwide LHC Computing Grid


These annexes are appended to the MoU and are regularly updated. Below you can find the most recent  versions.


List of Annexes

Annex 1

List of Tier 1 Centres (v 4 September 2019)

Annex 2

List of Tier-2 Centres (v 4 September 2019)

Annex 3

Minimal Computing Resource and Service Levels to qualify for membership of the WLCG Collaboration

Annex 4

List of Funding Agencies and their Representatives to the Computing Resources Review Board (v 2 July 2018)

Annex 5

The WLCG Collaboration

Annex 6

Pledges and Resources offered per Tier centre. All pledges can be found at which is converted into Annex 6.
6.4 Grid Operation Services (April 2010)
6.5 Pledges by Funding Agencies for Common WLCG Resources at CERN

Annex 7

Deployment Schedule from 2006-2008 (revised in 2005)

Annex 8

Programme of Work for the Deployment of the WLCG and Sharing of Responsibilities for its Execution

Annex 9

Rules of Procedure for the Resources Scrutiny Group (RSG)

Annex 10

Interim MoUs and Collaboration Agreements pertaining to the earlier work on the LHC Computing Grid and replaced by this MoU

Annex 11

Template Software License


Page last updated on: 4 Sep 2019