1. Tendering
A call for tenders does not take place because open source software is used. Motivation: All of the TOP 500 supercomputers work with the Linux open source operating system [2].
2. Compare Offer
Even open-source systems are subject to the competition of detail solutions. Similar to the Linux distribution Debian four to three development phases over several years are used: (experimental), unstable, test, stable.
3. Application Proposal
When the new version runs stably, it becomes the production system.