Architecture - 4 + 1 View Architecture

• 4+1 is a view model designed by Philippe Kruchten for describing the architecture of software-intensive systems, based on the use of multiple, concurrent views
• The views are used to describe the system in the viewpoint of different stakeholders, such as end-users, developers and project managers
• The four views of the model are 
•  logical 
• development
• process and
• physical view
• In addition selected use cases or scenarios (CTQ) are utilized to illustrate the architecture