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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) 2017 OPNFV Ulrich Kleber (Huawei)
+
+
+Current Status
+---------------
+
+This chapter summarizes the scenario analysis to provide some background.
+It also defines the way to introduce the scenario processes.
+
+Arno
+^^^^^^^^
+
+In Arno release, the scenario concept was not created yet.
+Looking back, we can say we had one scenario with OpenStack, ODL and KVM,
+that could be deployed in two ways, by the two installers available in Arno.
+
+Brahmaputra
+^^^^^^^^^^^^^^^^
+
+In Brahmaputra, we added options for SDN (ONOS, OCL) and some optional
+features (sfc, sdnvpn, kvm, l3 enabled ODL).
+Thus we had 9 scenarios, some of them to be deployed with 2 installers,
+that planned to participate in the release. Not all of them succeeded.
+
+Colorado
+^^^^^^^^^^^^
+
+In Colorado more components and features were added to a total of 17
+combinations of components and features. Some were supported by one
+of the four installers, others by multiple installers. In addition HA
+and NOHA options were defined.
+This lead to 28 combinations that planned to participate.
+
+Danube
+^^^^^^^^^^
+
+In Danube the number of combinations of components and features increased
+to 24, but since installer support increased and more scenarios planned
+to provide HA and NOHA options, the number of combinations was 54.
+
+In addition to that some scenarios were defined later in during development
+and some scenarios worked on ARM support.
+
+This created the need to better understand relationships and
+incompatibilities of the scenarios to drive for a manageable process
+for scenarios.
+
+As a result the relationship between the scenarios can be
+visualized by a scenario tree.
+
+.. figure:: scenario-tree-danube.png
+
+The process for generic and specific scenarios is not in place for the
+Danube release yet. But the different branches of the scenario tree
+provide the candidates to define generic scenario during the timeframe
+of the next release.
+
+Euphrates
+^^^^^^^^^^
+
+tbd: statistics on Euphrates Scenarios
+
+During Euphrates timeframe, dynamic POD allocation is introduced in CI.
+This is a prerequisite to make use of the SDF in the CI pipeline.
+Therefore in this timeframe, scenario processes are introduced only in
+a documentation way and as support for release management.
+
+Also the definition of generic scenarios can be done.
+
+
+
+
+