The project team at University of Kentucky is moving forward with the new Student Grading System. The information system will have three external entities, with the following data flows: Entity Data flow from the Entity Data flow to the Entity Student Tasks Submission Graded Tasks Student Records System Online attendance Final Grade Instructor Grading Parameters Grade Report Moreover, the respective information system will have four subsystems: Establish Gradebook, Assign Final Grade, Grade Student Work Produce Grade Report, and a data store called Gradebook. The data flows are as follows: Data Flow From To Class Roster Student Records System Entity Establish Gradebook Process Final Grade Assign Final Grade Process Student Records System Entity Final Grade Assign Final Grade Process Gradebook Data Store Grading Details Gradebook Data Store Assign Final Grade Process Submitted Work Student Entity Grade Student Work Process Graded Work Grade Student Work Process Student Entity Student Grade Grade Student Work Process Gradebook Data Store Class Gradebook Establish Gradebook Process Gradebook Data Store Grading Parameters Instructor Entity Establish Gradebook Process Class Detail Gradebook Data Store Produce Grade Report Process Grade Report Produce Grade Report Process Instructor Entity Draw a context diagram for the new Student Grading System. Draw a diagram 0 DFD that shows the four subsystems, the data store and the data flows. Explain the relationship between a context diagram and diagram 0 level DFD, and which symbol is not used in a context diagram?
The project team at University of Kentucky is moving forward with the new Student Grading System. The
|
Entity |
Data flow from the Entity |
Data flow to the Entity
|
|
Student |
Tasks Submission |
Graded Tasks |
|
Student Records System |
Online attendance |
Final Grade |
|
Instructor |
Grading Parameters |
Grade Report |
Moreover, the respective information system will have four subsystems:
- Establish Gradebook,
- Assign Final Grade,
- Grade Student Work
- Produce Grade Report, and a data store called Gradebook.
The data flows are as follows:
|
Data Flow |
From |
To
|
|
Class Roster |
Student Records System Entity |
Establish Gradebook Process |
|
Final Grade |
Assign Final Grade Process |
Student Records System Entity |
|
Final Grade |
Assign Final Grade Process |
Gradebook Data Store |
|
Grading Details |
Gradebook Data Store |
Assign Final Grade Process |
|
Submitted Work |
Student Entity |
Grade Student Work Process |
|
Graded Work |
Grade Student Work Process |
Student Entity |
|
Student Grade |
Grade Student Work Process |
Gradebook Data Store |
|
Class Gradebook |
Establish Gradebook Process |
Gradebook Data Store |
|
Grading Parameters |
Instructor Entity |
Establish Gradebook Process |
|
Class Detail |
Gradebook Data Store |
Produce Grade Report Process |
|
Grade Report |
Produce Grade Report Process |
Instructor Entity |
- Draw a context diagram for the new Student Grading System.
- Draw a diagram 0 DFD that shows the four subsystems, the data store and the data flows.
- Explain the relationship between a context diagram and diagram 0 level DFD, and which symbol is not used in a context diagram?
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