create DFD chart

Use Case Name: Maintain department course offerings	ID: _1_	Importance Level: High
Primary Actor: Department Staff
Short Description: This describes how department staff reviews course offerings, adds new courses, deletes existing courses or changes existing course information.
Trigger: Departments must prepare upcoming course offerings. Type: External/ Temporal
Major Inputs: Description Source Course offering changes Department Staff Course offerings Course offerings file	Major Outputs: Description Destination Updated course offerings Course offerings file Course offering list Department Staff
Major Steps Performed Department staff requests course offering list for the department. System generates a listof course offerings. Department staff enters new course information. Department staff indicate which courses to delete. The system updates course modifications from course offerings list.	Information for Steps Course offering list request Department identifier Course offering list New course information Course offering update Course number to delete Course offering update Course number to modify Course changes Course offering update