Elaboration can be closed if the following criteria are met:

• We have a detailed view of the most critical requirements;
• We have a stable architecture in executable code;
• The development environment is established and proved adequate;
• We have overcome the most important risks;
• We have an accurate idea of cost, planning and scope.

More information on details of this phase can be found in the Architecture Workflow.

More information on how people collaborate within this phase can be found in the Collaroration Matrix.