Lecture 2 Amin

Question 1

What is Information Technology?

Answer 1

Hardware, software, data, network, procedures, people.

Zachman v1992 says you need to have models for all these components to have a complete description of an information system/technology.

Question 2

Why are models (blueprints) used?

Answer 2

For communication and understanding a phenomenon.

Question 3

What is the difference between logical data models and conceptual data models?

Answer 3

Logical can not have N:N relationships (relational model)

Conceptual models can lack an identifier (entity relationship model)

Physical models include a data type

Question 4

What is the role of CRUD?

Answer 4

Analyzing the current state of an organisation.

Suggest new processes based on missing C R U D (a tool for designing (to-be) state of an organization.

Question 5

What models belong in the cells of Zachman framework’s ‘what’ column?

Answer 5

Executive perspective: list of important information and inventory required for business.

Business management perspective: conceptual model

Architectural perspective: physical model/relational model

Engineer perspective: physical data model

enterprise perspective: tables and data

Question 6

What is the definition of EA according to Ross?

Answer 6

The organizing logic for business processes and IT infrastructure reflecting the integration and standardization of the company’s operating model

Question 7

What are the rules of ZF?

Answer 7

there is flexibility in the level of detail; you can provide one or more diagrams in a cell

artifacts in a row must be consistent; cells in columns and rows must be integrated