Feasibility study and data flow diagram

1. Presented by:- Shikha dubey Surabhi Prajapati Richa Rajput Feasibility study and Data flow diagram

2. Component of Structured Analysis Graphic symbols Data flow diagram Data dictionary Procedures and process description Entity Relational Model (Logical Data Stores) Normalisation

3. Data flow diagram

4. Data flow diagram Data Flow Diagram (DFD) is graphical representation of flow of data/info. It is used to show how data is moved between different processes. Which graphically represent the relation between processes and data. Data Flow Analysis The stress is mainly on data analysis. After the flow of data through business processes is data flow analysis . While handling transactions and finish by tasks, data are input, processed, stored retrieved used, change and output. Data flow analysis studies the use of data in each event .

5. Types of Data flow diagram

6. Physical Data flow diagram Physical characteristics include -   Names of people -   Forms and document Name -   Names of department -   Master and transaction files -   Equipments and devices used -   Locations Most comprehensive and useful approach to developing an accurate and complete description of current system begins with the development of a physical DFD

7. Data flow diagram Data Flow Diagram (DFD) is graphical representation of flow of data/info. It is used to show how data is moved between different processes. Which graphically represent the relation between processes and data. Data Flow Analysis The stress is mainly on data analysis. After the flow of data through business processes is data flow analysis . While handling transactions and finish by tasks, data are input, processed, stored retrieved used, change and output. Data flow analysis studies the use of data in each event .

8. Drawing data flow diagrams: Four simple notations are sufficient to finish a DFD. They are:-

9. Data flow diagram External Entity Process Process Process Process Process External Entity

10. Advantage of DFDs

11. Disadvantage of DFDs