One of the hot words over the last few years has been "Bimodal IT". I won't go into a complete definition - let's leave the people who make much money off of the idea to explain it. The short form is that some technology activities are more traditional, sequential and driven by a focus on safety, while others are more innovative, agile and driven by a focus on new risks.

There is a famous saying, known as Conway's Law, which states that: organizations which design systems ... are constrained to produce designs which are copies of the communication structures of these organizations It means that when your organization builds a system, its structure will reflect the organization that created it. If you have 3 teams - database administrators, system administrators and Web developers - then your system architecture will have 3 distinct components: databases, servers and Web UI.