TEC's management wants to keep track of the following entities:

- COMPANY
- OPENING
- QUALIFICATION
- CANDIDATE
- JOB HISTORY
- PLACEMENT
- COURSE
- SESSION

Given that information, complete the following tasks:

a. Draw the Crow's Foot ERD for this enterprise.
b. Identify all possible relationships. Identify the connectivity for each relationship.
c. Identify the mandatory/optional dependencies for the relationships.
d. Resolve all M:N relationships.

In TEC's management system, the Crow's Foot ERD can be used to represent the entities and relationships. Several one-to-many relationships can be identified, as well as a couple of many-to-many relationships. M:N relationships can be resolved by introducing an associative entity.

Explanation:

TEC's Crow's Foot ERD:

In a Crow's Foot ERD, entities are represented by rectangles, relationships are represented by diamonds, and attributes are represented by ovals. Based on the given information, the ERD for TEC's management system would include the following entities:

COMPANY
OPENING
QUALIFICATION
CANDIDATE
JOB
HISTORY
PLACEMENT
COURSE
SESSION

The possible relationships and connectivity for each are as follows:

One-to-Many: COMPANY-OPENING, QUALIFICATION-CANDIDATE, CANDIDATE-JOB, JOB-HISTORY, CANDIDATE-PLACEMENT, COURSE-SESSION
Many-to-Many: CANDIDATE-COURSE, CANDIDATE-SESSION

The mandatory/optional dependencies for these relationships need more context to determine.

Resolving M:N Relationships

For the M:N relationships, you can resolve them by introducing another entity called an associative entity. This entity connects the two entities and expands the relationship into two one-to-many relationships. In this case, the M:N relationships would be resolved by introducing entities like APPLICATION and ENROLLMENT.