Data Flow Diagram
Data modeling is the formalization and documentation of existing processes and events that occur during pplication software design and development. It simplifies the complex process of software design, making a “blueprint” for construction. The purpose of this standard is to establish guidelines for budget unit and State implementations of data modeling that facilitate common, interoperable representations and descriptions of data and information that is collected and managed.
This applies to all budget units. A budget unit is defined as a department, commission, board, institution or other agency of the state receiving, expending or disbursing state funds or incurring bligations of the state including the Arizona Board of Regents but excluding the universities under the Jurisdiction of the Arizona Board of Regents, the community college districts and the legislative or Judicial branches. A. R. S. S 41-3501(2).
The Budget Unit Chief Executive Officer (CEO), working in conjunction with the Budget Unit Chief Information Officer (CIO), shall be responsible for ensuring the effective implementation of Statewide Information Technology Policies, Standards, and Procedures (PSPs) within each budget unit.
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2. 3. 4. STANDARD Data modeling is the graphical mapping of data/information in its elations to IT software application systems, sub-systems, and processes that gather, manage, transform, and communicate such data/information.
Data modeling is an important component of systems development and re-engineering that can ensure program design supports requirements for scalability, robustness, security, extensibility, and other characteristics, before implementation in programming code renders changes difficult and expensive to make. 4. 1 . In accordance with the implementation criteria defined in Statewide Policy P740, Data/lnformation Architecture, when required, budget units shall complete, and subsequently update hroughout the development cycle of the IT project, a high-level physical data flow diagram (DFD) for the IT project’s standard Rev 2. Data Modeling Effective: October 31, 2007 Page 2 of 8 software application, such as illustrated in Attachment A, Data Modeling Symbols, Definitions, and Samples.