DYA is Sogeti’s vision on how to work with architecture. It concerns the creation and management of the enterprise architecture, which has to be dynamic in nature. The organization needs to be streamlined, smart and swift with their architecture. 
DYA was developed based on experiences in the field regarding the manner in which architecture was handled.

DYA is based on ten main principles. These principles are supported by the following concepts. 

• Enterprise architecture is not a goal in and of itself, but should be an enabler for the organization with which to reach its goals. Architecture should not have the delivery of a document as its goal, but rather ensure that the change processes within an organization are implemented smoothly. Architecture development should be anchored in these change processes;
• Architecture can be implemented bit by bit. It’s not necessary to deliver an entire architecture document in one go. Architecture is supposed to evolve along with the organization;
• It may be necessary to deviate from the architecture on occasion. It is therefore important to outline how such deviations can be managed. This can be done by defining various development scenarios: one for developing using architecture and one without.          

The heart of DYA is the DYA model. This model contains four processes which cover the entire realm of enterprise architecture, from strategy to implementation. 
These processes guide you in defining your architecture, so that you are able to deploy ICT in a cost effective and efficient manner. 
The relation between business architecture, information architecture and technical architecture is thereby guaranteed. 
Developing architectural processes using DYA has the advantage of having all the milestones documented, when architectural processes are defined and implemented. This identifies when an architect is required and what he/she will deliver. The result being the correct architecture at the correct time. 

DYA has its own architecture framework in order to classify architecture. It represents, if you will, a chest of drawers where each architecture has its own spot. The architecture framework illustrates the necessity to view the architecture within an organization not as a monolith but rather as a collection of smaller entities. Some of these entities will be worked out in detail (the matrix cell will be filled in) whereas others will not have been worked out (the matrix cell is empty). This is perfectly acceptable. Providing the cells that have been filled are consistent with each other and with the business goals and that the cells required for driving the changes within the organization have been filled. 

DYA has grown into the defacto standard for working with architecture. Many of our customers have used DYA to successfully implement and professionalize working with architecture.