Question

First, review the following Context DFD examples

• Medical Chart Tracking System
• Grading System
• Order System
• Correct and Incorrect Examples of Data Flows

Second, create a Context DFD (using Lucidchart or other software) of a process of your choice. Your Context DFD should include at least 3 external entities and at least 6 data flows.

Save your Context DFD as an image file or link and insert it into your post.

Type a few sentences explaining your system.

Name the internal processes, data stores, and additional data flows that would be included in a Diagram 0 for your process. (You do not need to create the Diagram 0 - you only need to name the additional internal processes, data stores, and data flows).

Answer 1

Data Flow Diagram(DFD): Data Flow Diagram is a formal way of representing the data flows within a system. Data Flow Diagram provides a clear picture of system requirements and process flow graphically. DFD shows the flow of information, how the data enters at each level of the system, what changes happened at each level, and where the data sored.

My choice is:

Grading System

For the Grading system, I have considered entities as :
Student
Employer
Professor

Data Flow:

1. Student Submits the work and gets grade assignments from the process'Submit Work'.
2. Each course contains its separate ID to identify.
3. Submitted work can be graded as based on IDs and data flows to 2.
4. The professor checks the grade submitted work and assigns a grade based on ID.
5. Then upgraded assignment and grade details flow to 2.
6. All student details are sored as portfolios based on their IDs.
7. Employer checks the respective ID and gets the grade details.
8. Students can get grade details from the office Employer.
9. If any student has any doubts or concerns, he/she can schedule a meeting with the professor.