the builder's perspective, with sufficient detail to understand the constraints of tools, technology, and materials. The builder's plans correspond to the technology models, which must adapt the information systems model to the details of the programming languages, input/output (I/O) devices, or other required supporting technology. Technician Perspective (Tool Components) - Subcontractors work from shop plans that specify the details of parts or subsections. These correspond to the detailed specifications that are given to programmers who code individual modules without being concerned with the overall context or structure of the system. Alternatively, they could represent the detailed requirements for various commercial-off-the-shelf (COTS), government off-the-shelf (GOTS), or components of modular systems software being procured and implemented rather than built. Enterprise Perspective or (Operations Instances) Focus of columns In summary, each perspective focuses attention on the same fundamental questions, then answers those questions from that viewpoint, creating different descriptive representations (i.e., models), which translate from higher to lower perspectives. The basic model for the focus (or product abstraction) remains constant. The basic model of each column is uniquely defined, yet related across and down the matrix. In addition, the six categories of enterprise architecture components, and the underlying interrogatives that they answer, form the columns of the Zachman Framework and these are: Inventory Sets — What Process Flows — How Distribution Networks — Where Responsibility Assignments — Who Timing Cycles — When Motivation Intentions — Why In Zachman's opinion, the single factor that makes his framework unique is that each element on either axis of the matrix is explicitly distinguishable from all the other elements on that axis. The representations in each cell of the matrix are not merely successive levels of increasing detail, but actually are different representations — different in context, meaning, motivation, and use. Because each of the elements on either axis is explicitly different from the others, it is possible to define precisely what belongs in each cell. Models of cells The Zachman Framework typically is depicted as a bounded 6 x 6 "matrix" with the Communication Interrogatives as Columns and the Reification Transformations as Rows. The framework classifications are repressed by the Cells, that is, the intersection between the Interrogatives and the Transformations. The cell descriptions are taken directly from version 3.0 of the Zachman Framework. Executive Perspective (What) Inventory Identification (How) Process Identification (Where) Distribution Identification (Who) Responsibility Identification (When) Timing Identification (Why) Motivation Identification Business Management