Need help crating an E-R diagram for the problem attached.

 

 

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Innovative Scheduling, Inc. Gainesville Case Study 4 4 Course Timetabling Course Timetabling Problem Description
Preparing course timetables is an important and difficult task for academic institutions.
Given (a) a list of courses offered that semester, (b) a list of faculty members, (c) a list of
students registered for the courses, (d) a list of classrooms available, and (e) a list of
periods in a week, the task is to prepare a timetable for the current semester. To make
this task easier, the timetable from the previous year/semester will be taken as an input. If
there are no changes, the same timetable can be used. Possible changes should be
identified and it should be ensured that they would not cause any conflicts. For example, if
the number of students taking a course changes, this may force a change in the
classroom assigned due to room capacity; if the instructor of a course changes, this may
also cause a conflict in that instructor’s weekly schedule.
The courses are grouped by college and department, and within a department they are
grouped into four different levels (i.e., courses offered to freshmen, …, seniors). In a
semester, a group of students follows a set of courses and hence these courses must be
assigned to different time periods. The business rules to be followed in building a course
timetable are identified as follows:
1. All courses must be assigned to the required number of periods. 2. An instructor cannot be assigned to more than one course in a period. 3. Courses belonging to the same group cannot be assigned to the same time period. 4. A course can only be assigned to an available room in a period if the number of
students taking that course is at least 75% and at most 105% of room capacity. 5. The number of courses assigned in a particular period cannot be greater than the
number of rooms available. Database Design
The following are the main entity types of the academic institution database. For each
entity type, we provide some of the corresponding attributes. Use this information in order
to: (a) Build an Enhanced E-R diagram; (b) Transform the Enhanced E-R diagram to a
relational database. Identify the primary key(s) and the foreign key(s) for each relation.
Draw the relational integrality constraints; (c) For each of the relations created, indicate its
normal form. If the relation is not in the 3NF, decompose it into 3NF relations.
1. Instructor: The main attributes are identification number, name, address, name of the
department and college s/he is working for, area of specialty, etc. 2. Course: The main attributes are course number, name, prerequisites, number of
credit hours, group of courses it belongs to, etc. 3. Student: The main attributes are identification number, name, address, birthday,
gender, department and college s/he is in, etc. 4. Classroom: The main attributes are room number, name of the building, capacity, and
description of any special feature (for example, media equipment, computers, video,
etc.). 5. Period: The main attributes are period number, start time, and end time. 16 Case Study 4
6. Course Timetabling Assignment: This is an associative entity. Its attributes are number of students taking
a particular course taught by a particular professor during a particular time period. Note that the relation between students and courses is a many-to-many relationship.
Students get a grade for each course they take. Access Application Development
The following are some of the queries, forms, and reports that students can create in order
to increase the functionality of the database:
Queries:
We already mentioned that the timetable from the previous year/semester is taken as an
input in building the current semester’s timetable. The schedule would change in the
following cases: (a) A professor prefers to teach in a different classroom in a different time
period; (b) A professor is offering a new class; (c) The number of students registered for
the class is bigger than classroom capacity; etc. The following queries facilitate the
process of updating the course timetable.
1. Professors are interested to know their weekly schedule. Create a query that prompts
for the professors’ name and returns their weekly schedule. 2. Create a query that prompts for students’ identification numbers and returns their
timetables for the current semester. 3. Create a query that prompts for the name of a course and returns its current
schedule. 4. For each course offered in the current semester, present the total number of students
registered, the classroom capacity, and the classroom description. This query will
help to identify possible changes to the timetable due to the class capacity or
equipment (computers, video, etc.) availability. 5. Every semester there are a number of new courses offered that have to be assigned
to a period/room.
a. List all the courses offered for the first time. b. List the eligible periods/classrooms for an unassigned course. This list should
adhere to all the business rules given above. 6. For each time period, list the addresses of the classrooms that are available. This list
will be given to the professors. In the case that professors do not like their current
schedules, they can re-allocate the class in one of the available period/classroom
combinations. 7. Create a query that prompts for the name of a department and course level
(freshmen, …, senior) and returns the timetable of the courses for this particular
group. The results from this query are used to check whether the courses belonging
to this particular group are assigned to the same class period. 17

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