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About this document
- Pages
- 8 pages
- Price
- $8 one-time, yours to keep
- Membership
- Included in every plan
- Format
- Subject
- Computer Science, Information Systems
- Module
- MCS-14
This document covers rules for drawing Data Flow Diagrams (DFDs) and provides examples for a Student Information System. It also discusses software cost estimation techniques, including the Constructive Cost Model (COCOMO).
What's inside
- Rules for drawing Data Flow Diagrams
- Entity Relationship Diagram for a Railway Reservation System
- Entity Relationship Diagram for a Student Information System
- Software cost estimation techniques
- Constructive Cost Model (COCOMO)
- Intermediate COCOMO and cost drivers
Who it is for: Students taking a course on Data Flow Diagrams, likely in Computer Science or Information Systems. (Undergraduate)
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Summary
Data Flow Diagrams are tools for visualising how data moves through a system. Software cost estimation is a method for predicting the effort and time needed to develop software. Students get examples of Data Flow Diagrams and Entity Relationship Diagrams. They also learn about the COCOMO model for software cost estimation.
Data Flow Diagrams
Data Flow Diagrams show how data moves through a system. Rules for drawing them include ensuring each process has data flows in and out. Students draw Data Flow Diagrams for a Student Information System.
Entity Relationship Diagrams
Entity Relationship Diagrams show how data is stored and related. Students draw Entity Relationship Diagrams for a Railway Reservation System and a Student Information System. They make necessary assumptions.
Software Cost Estimation
The COCOMO model estimates software development effort and time. It uses program size and cost drivers to calculate effort applied and development time. Students learn about Basic, Intermediate and Detailed COCOMO.
Software Testing
Software testing methods include black box testing and white box testing. Black box testing treats the software as a black box, without knowledge of internal implementation. White box testing uses internal data structures and algorithms.
Key terms
- Data Flow Diagram
- A diagram that shows how data moves through a system.
- Entity Relationship Diagram
- A diagram that shows how data is stored and related.
- COCOMO
- A hierarchy of software cost estimation models.
- Black box testing
- A testing method that treats the software as a black box.
- White box testing
- A testing method that uses internal data structures and algorithms.
- Cost drivers
- Subjective assessments of product, hardware, personnel and project attributes.
Questions this document helps with
- How do you draw a Data Flow Diagram?
- What are the rules for drawing Data Flow Diagrams?
- What is the COCOMO model for software cost estimation?
Summary written with AI from the document's text.
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