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Enterprise Data Modeling
the first step in database development, in which the scope and general contents of organizational databases are specified
- Information Systems Architecture.a conceptual blueprint or plan that expresses the desired future structure for the information systems in an organization
A formal, top-down methodology that uses a data orientation to create and maintain information systems
a generic information systems planning methodology that attempts to gain a broad understanding of the information system needs of the entire organization
ISA Key Components
- 1. Data
- 2. Processes
- 3. Networks
- 4. People
- 5. Events and points in time
- 6. Reasons
A related group of business processes that support some aspects of the mission of an enterprise
an iterative process of breaking down the description of a system into finer and finer detail in which one function is described in greater detail by a set of other, suipporting functions
Corporate Planning Objects
- 1. Organizational Units
- 2. Organizational Locations
- 3. Business Functions
- 4. Entity Types
- 5. Information Systems
- Systems Development Life Cycle.the traditional methodology used to develop, maintain, and replace information systems.
An iterative process of systems development in which requirements are converted to a working system that is continually revised through close work between analysts and users
Agile Software Development
an approach to database and software development thate emphasizes "individuals and interactions over processes and tools, working software over comprehensive documentation, customer collaboration over contract negotiation, and response to change over following a plan."
a planned undertaking of related activities to reach an objective that has a beginning and an end
a strategy in systems development projects in which the project is reviewed after eacvh phase and continuation of the project is rejustified in each of these reviews
- External Schema
- Conceptual Schema
- Internal Schema
a detailed, technology-independent specification of the overall structure of organizational data
the representation of a database for a particular data management technology
specifications for how data from a logical schema are stored in a computer's secondary memory by a database management system.
Three-Tiered Database Location Architecture
- Client tier
- Application/Web Server
- Enterprise Server (minicomputer or mainframe) tier
a LAN-based environment in which database software on a server (called a database server or database engine) performs database commands sent to it from client workstations, and application programs on each client concetrate on user interface functions.