Information systems Introduction Bogdan Shishedjiev Information system 1

Introduction • Personal Information – Assoc. prof. Bogdan Shishedjiev • Office 2302, mail: bogi@tu-sofia. bg – Assist. Prof. Anastassia Vangelova • Office 2300 a, 2307 • Course – http: //ff. tu-sofia. bg/~bogi – Lectures & exercises – Control & project Bogdan Shishedjiev Information system 2

Information System Control System Coordination, goals Decisions Information from outside Processed Information system Process, memorize Gathered Information In flow g n i com Information to outside Control Production system Operational control Bogdan Shishedjiev Information system Ou tgo ing flow 3

Information System • Overview – Translate an overview of the company in such a way to bind the development of a managerial information system to an overhaul of the organization. This fully integrated information system in the life of the company then makes a particularly powerful element of company control. ��the control system manages the company and remains focused on the goals selected. The CEO, department head but also in its scale, the foreman in charge of a production unit; �the information system provides the link between the two. It informs, after analysis, the decision making system about operational system performance. Symmetrically, it transmits to the latter, the instructions of the control system. after having translated them Bogdan Shishedjiev Information system 4

Information System • Separation the data from processing • Approach by levels Level Data Processing Conceptual Data Model Conceptual Preocessing (CDM) Model (CPM) Organization Logical Data Model (LDM) Organization Preocessing Model (OPM) Technical Logical Data Model (LDM) Operational Model Bogdan Shishedjiev Information system 5

Information System • Execution order 1. Studying the state of art 2. Model Design – – Conceptual Data Model Processing Model 3. Validation 4. Logical Data Model 5. Operational Model & Progamming Studying the state of art 50 % Model Design 25 % Logical Data Model 10% Operational Model & Progamming 15% Bogdan Shishedjiev Information system 6