1. Process Decomposition
Techniques for system modeling

2. Functional Decomposition
Functional decomposition is used to design large transaction type systems in which the process sequence is determined by the computer
Hierarchy Charts
Data Flow Diagrams
IPO analysis

3. Registration Problem
Students register for OU classes at UCT by determining classes from the catalog with advice from program and staff advisors. Once classes start students attend classes and prepare assignments. At the end of the semester the professor assigns grades and reports results to the University.

4. Hierarchy Charts
Hierarchy charts are used to identify the major functions that a system must perform, next identify major sub-functions, etc.
Hierarchy charts can also include input and output variables.

5. Hierarchy Chart Register for Class Review Catalog
Consult Program Advisor
Consult UCT Advisor
Take Course
Attend Classes
Prepare Assignments
Generate Grades
Assign Grades
Report Results

6. Data Flow Diagram Context (Level 0)
Advice
Requests
Students
Advisors
Schedules
Registration
System
Grades
Work
OU Admin

7. Data Flow Diagram Level 1
Requests
Students
Advice
Advisors 1.
Register
for
Class
Classes
Schedules
D1 Classes
Work
Roster
D3 Rolls St 3.
Generate
Grades
Roster 2.
Take
Course
D2 Students
Grades
Test_Results
OU Admin

8. Entity Relationship Diagram
Classes
Students
Rolls