Question 3 a) Discuss how you would use the Unobtrusive method of data gathering at AIT University in developing a system which could be useful to the institution. d). As in the discussion question on the Unobtrusive method of data gathering in Question 3(a) above, develop a Context Level "0" Data Flow diagram for that useful system. You can either draw the diagram or just state the objects/entities and their interaction(s) with that useful system.

Question 3 a) Discuss how you would use the Unobtrusive method of data gathering at AIT University in developing a system which could be useful to the institution. d). As in the discussion question on the Unobtrusive method of data gathering in Question 3(a) above, develop a Context Level "0" Data Flow diagram for that useful system. You can either draw the diagram or just state the objects/entities and their interaction(s) with that useful system.

Fundamentals of Information Systems

8th Edition

ISBN:9781305082168

Author:Ralph Stair, George Reynolds

Publisher:Ralph Stair, George Reynolds

Chapter8: Systems Development

Section: Chapter Questions

Problem 8SAT: Data modelling is most often accomplished through the use of a(an) ________________. a....

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Entity-Relationship Diagram (ERD) is one of the data modeling tools that provides a software engineer with the ability to represent data objects, their characteristics, and their relationships. Use an ERD to describe the following scenario. A teacher is identified by an ID number (TID), last name (LName), and first name (FName). A project is identified by a project ID (PID) and title (T). A student is identified by an ID number (SID), last name (LName), and first name (FName). A teacher can supervise zero, one, or many students and a student is supervised by one teacher. A teacher must propose one or many projects and every project is proposed by one teacher. A student must work on one project and every project is worked by only one student.
Describe the guidelines that must be followed in order to construct effective data-flow diagrams.
Data modelling is the process of documenting a software system design as an easy-to-understanddiagram. Data modelling allows you to conceptually represent the data and the association betweendata objects and rules. 1. Elaborate on FIVE (5) primary goals of data modelling in software design. 2. Following from question 1, elaborate on any FIVE advantages of implementing data models insoftware design.
During the process of conceptual data modelling, what are the four various kinds of E-R diagrams that are built and examined, and what is the purpose of doing so?
1. Create the Context Level Data Flow Diagram (DFD) of clothes Ordering System and Decomposing it to Level 1 Data Flow Diagram (DFD).
(a) Explain carefully four ways in which the diagram fails to model the intended world. In each case make sure you contrast the actual meaning with the intended meaning. (b) Give an entity-relationship diagram, still using two entity types, which correctly models the intended world. (c) Give a database schema (including primary keys) for the ER diagram which you have given in the previous part. (d) Is there any part of the ER diagram which is not captured in the schema? How might this aspect be captured in the final database?
Direct connections between external entities and the database are not permitted. This is one of the data flow diagram design concepts to consider. What does this advice imply?
QUESTION 6 Read the following scenario and draw a logical data flow diagram that includes both the Context diagram and Level '0' diagram (Diagram 0 for students only) on a piece of paper and upload it as a solution for this question. C1. , take a clear photo UTAS-Suhar Library head decided to build a new online library system to facilitate borrowing books for students anả instructors. So, the proposed system will allow the students and instructors to login to the system with their usernames and password and then the system will authenticate them to make sure that they are authorized people or not. Also, it will allow them to search for books by using book title or ISBN. In addition it will allow them to borrow a book for a specific period. Finally, when the due date arrives, they must return the books to the library and receive the confirmation receipt. The system also will allow the Liberian to check for the available books and order new books. The head of the Library will be able to…
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What steps can you take to ensure that your model gets access to all the data it requires? How may data modeling approaches assist problem statements?
Prepare a context diagram and a Level 0 Data Flow Diagram ( DFD) for each of the following scenarios. Collect time and attendance reports from different departments to calculate weekly wages. This data is validated before payroll is prepared. A customer order is approved and filled. The inventory data is then updated. A customer cancels her mail order. The cancellation is processed and a confirmation is sent to the customer.