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Enterprise Boundary Definer

Draw the boundary of the enterprise that architecture will govern, distinguishing what is inside scope from what is a trading partner, regulator, or external dependency.

PreliminaryDerived from TOGAF

Drawing the enterprise boundary: who is inside the architecture, who is outside

Every function the architecture touches sits on one side of a single line. Inside the boundary the architect designs; outside it the architect coordinates, complies and serves.

The enterprise boundary is the first deliverable of the Preliminary phase. Without it the architecture has no scope. The line shows which functions the architect is licensed to design for and which sit outside the remit.

Drawing the enterprise boundary: who is inside the architecture, who is outside Two columns split by a dashed central rail labelled the enterprise boundary. The left column, in red, lists four functions inside the boundary that the architect designs for: the board and executive who sponsor, business units in scope, shared services the design is constrained by, and contracted delivery partners. The right column, in blue, lists three functions outside the boundary that the architect works with rather than designs: customers who are served, the regulator the design complies with, and peer operators it coordinates with. A legend names the two sides and a red note states the boundary is the first deliverable, because until the line is drawn the architecture has no scope. Inside the boundary The architect designs for these Outside the boundary The architect works with these The enterprise boundary F1 Board and executive Sponsors F2 Business units in scope Designed for F3 Shared services Constrained by F4 Delivery partners Contracted F5 Customers Served F6 Regulator Complies with F7 Peer operators Coordinates with Inside: the architect holds the penOutside: a relationship to manage The boundary is the first deliverable.Until the line is drawn the architecture has no scope, so every later phase inherits the inside set thePreliminary phase agrees here.