The DEISA Extreme Computing Initiative (DECI) is a scheme through which European computational scientists can apply for single-project access to world-leading computational resources in the European HPC infrastructure, operated by DEISA, for a period of up to 12 months. DECI aims to enable European researchers to obtain access to the most powerful national computing resources in Europe, regardless of their country of origin or work and to enhance DEISA's impact on European science and technology at the highest level.

Through an open, competitive call, a number of capability computing projects will be selected on the basis of innovation and scientific excellence. These projects must deal with complex, demanding, innovative simulations that would not be possible without the DEISA infrastructure, and which would benefit from the exceptional resources of the Consortium. In addition to offering access to computing resources, DEISA offers applications-enabling assistance from experts at the leading European HPC centres to enable projects to be run on the most appropriate platforms in the DEISA consortium.