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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Data modelling is most often accomplished through the use of a(an) ________________. a. entity-relationship diagram b. data-flow diagram c. functional decomposition diagram d. activity diagram
1a. Discuss how you would use the Interactive method of data gathering atyour workplace or in your line of work in developing a system whichcould be useful to the organization. 1b. As in the discussion question on the Interactive method of datagathering in Question 1(a) above, develop a Context Level "0" Data Flowdiagram for that useful system. You can either draw the diagram or juststate the objects/entities and their interaction(s) with that usefulsystem.
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?
(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?
Develop a simple data model for a student database that includes student data, student contact data, student demographic data, student grades data, and student financial data. Determine the data attributes that should be present in each table, and identify the primary key for each table. Develop a complete entity relationship diagram that shows how these tables are related to one another.
An objective of this task is to denormalize a conceptual schema to speed up processing of a given class of applications. The following conceptual schema represents a database domain where the contract and permanent employees are assigned to the projects. (see image below) Requirements Steps Involved: - Elimination of generalization using Association, Subset or Superset method - Simplifications: •Elimination of association classes •Elimination of link attributes •Elimination of many-to-many associations Perform simplification of the conceptual schema above and re-draw the simplified conceptual schema.
Explain the Entity-Relationship Diagram (ERD) and its components. How does it help in visualizing and designing data models?
Your task for this assignment is to complete a database design for the given case studies. Model the system described in the case study and draw a Physical Data Model using MySQL Workbench. Your diagram must conform to the notation used in this subject (object notation = ‘Workbench Simplified’, relationships notation = ‘Crows Foot’, show data types). If you include sub-types, place them inside a Layer with a note explaining their relationship to the super-type.
1. To create the ERD for the SIM system, the Entity - Relationship Diagram, which helps to describe the database for a computer system, go back to the information system DFD you created for Assignment 4 and just label the data flow arrows using the cardinality notation. That will show the relationship between the entities on your ERD. 2. To design sample data tables from the ERD you created in #1, you need to think of the objects that will be part each process. These objects will become the column headers for your table. So for example, the Customers table will have fields like name and address, and their household should have an ID #. Do this for all the objects in your ERD. Carlie asked that the database be a 3NF or Third Normal Form, all that means is that you will have a simple, one field, primary key for each of your data tables. No data repeats in any table and all of the fields in a table are dependent on its primary key. So you should create 6 data tables, one for each of the…
a) Discuss how you would use the Unobtrusive method of data gathering at your workplace or in your line of work in developing a system which could be useful to the organization. b) As in the first discussion question on the Unobtrusive method of data gathering in Question 1(a) above, generate a Use-Case for that useful new system. You can either draw the Use-Case or just state the actors and their actions in the system.
Direct connections between external entities and the database are not permitted under any circumstances. It should be kept in mind as one of the data flow diagram design concepts to consider. What do you think the repercussions of this suggestion will be?
129. The type of data independence in which the schema can be altered on conceptual level without altering external level is classified as a. conceptual level independence b. external level independence c. logical data independence d. physical data independence