Employee Management System ER Diagram

Employee Management System (ER) Entity Relationship Diagram

The Entity Relationship Diagram for Employee Management System is used to provide idea on how to make the system’s database design. The idea presented here can be used for your Employee management system final year project. You can enhance the ER diagram for employee system to meet your desired system requirements.

Employee Management System ER Diagram: Project Details

The table shows the details of Employee Management System ER Diagram. It has the complete description about the project’s information.

Name:Employee Management System ER Diagram and Database Design
Abstract:Employee Management System ER Diagram depicts the relationship between various entities. It can be thought of as a blueprint for your system (project) structure. 
Diagram:ER Diagram also known as Entity Relationship Diagram
Users:School Librarian, Student (Book Borrowers), and School Admin
Tools Used:Diagraming tools that provides ER diagram symbols.
Employee Management System ERD – Project Details

Employee Management System ER Diagram Description

The employee management system ER Diagram was made based on managing employees’ information requirements. Its database design can store and secure employees’ information. Admin can have access to the employees’ status and information to see their performances and salaries. They can handle the data needed in managing employees and their job departments.

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The features included in the system ER diagram were the security and monitoring of the employees’ job and range of service records, job information and status. These features were also listed and recorded in reports that served as the history of transactions done in the system.

Employee Management System ER Diagram Features:

  • Employee Management: This feature plays a big role for the system because this gathers the important information of the employees. These information were used to track their job performance and other important matters regarding the system. The system will also check the attendance of the employees.
  • Manage Salaries and Bonuses: The salary and bonuses management will be done by the admin to track the wages and expenses of the establishment. This process will help them in updating the status of the payroll in terms of giving the salaries and other matters regarding their employees.
  • Manage Job Departments and Status: Its feature will manage and monitor the job status of every employee and then will calculate their salaries for the range of their labor or per month. This will also record all the expense of the establishment and then save it to database for future or inventory purposes.
  • Manage and Monitor Transaction Records: This is the process where the admin should keep track to every transaction made by their employees with the product or services offered to their customers. The system will also monitor their attendance and Leave to determine the range of their work and to calculate the exact salary for them.

Importance of ER Diagram for Employee Management System

The importance of ER Diagram for Employee Management System is that it helps in modeling its data storage or database. It is the basis of the project’s database foundation for construction. This entity relationship diagram (ERD) also aids in defining the data types to be stored such as their attributes and characteristics.

In addition to that, the ER Diagram also describes how an entity interacts with other entities. Employee management System project is presented with ER Diagrams to model its database design.

ER Diagram For Employee Management System (Database Deign)

ER Diagram of Employee Management System shows the system entity relationships in each entity and their supposed functions in each relationship.

Employee Management System ER Diagram (2)
ER Diagram For Employee Management System (Database Deign)

This diagram presents the Entities’ Relational Model for Employee Management System. It is used to enlighten you with how the back end or the database of the project works. The tables are made to meet the required specification of the system and provide much more specific details of each entity within the system.

Based on the image above, the Entity Relationship diagram for this System is the entity of the employee management system database, which is presented by tables. The tables are made to meet the required specification of the system and provide much more specific details of each entity within the system.

You can now have the PDF file of the Employee Management System ER Diagram for you to have your own copy and basis for your future studies in DBMS.

Employee Management System ER Diagram (Database) Tables

These tables below provides the complete database design details such as Field Namestudent management system projectdata types, and character lengths for Employee System.

Table Name: Employee

emp_ID (PK)Employee IDInt11
fnameEmployee First NameVarchar255
lnameEmployee Last NameVarchar255
genderEmployee GenderInt11
ageEmployee AgeInt11
contact_addContact AddressInt11
emp_emailEmployee EmailVarchar255
emp_passEmployee PasswordVarchar255

Table Name: Users

admin_ID (PK)Admin IDInt11
fnameInstructor First NameVarchar255
lnameInstructor Last NameVarchar255
genderInstructor GenderInt11
ageInstructor AgeInt11
contact_addContact AddressInt11
admin_emailAdmin EmailVarchar255
admin_passAdmin PasswordVarchar255

Table Name: Job Department

job_ID (PK)Job IDInt11
job_deptJob DepartmentVarchar30
nameJob NameVarchar30
descriptionJob DescriptionVarchar30
salary_rangeSalary RangeVarchar30

Table Name: Salary or Bonus

salary_ID (PK)Salary IDInt11
job_ID (FK)Job IDInt11
annualAnnual ExpenseDate

Table Name: Qualification

qual_ID (PK)Qualification IDInt11
emp_ID (FK)Employee IDInt11
positionPosition of ApplicationVarchar30
date_inDate InDate

Table Name: Payroll

payroll_ID (PK)Payroll IDInt11
emp_ID (FK)Employee IDInt11
job_ID (FK)Job IDInt11
salary_ID (FK)Salary IDInt11
leave_ID (FK)Leave IDInt11
dateDate of Payroll ReportDate
total amountTotal AmountInt11

How to build ER Diagram for Employee Management System with Cardinality Ratio

Time needed: 5 minutes.

Steps in building the ER Diagram for Employee Management System with Cardinality Ratio.

  • Step 1: Familiarize the ER Diagram (Entity Relationship Diagram) Symbols and Cardinality

    Entity Relationship Diagram – shows the structure of data types in a project. It uses symbols to clarify its parts and relationships. Their symbols and applications must be familiarized before you build the ER Diagram.

    ER Diagram Symbols:
    Fields : Fields are the parts of a table that define the entity’s characteristics. In the database that the ERD models, attributes are commonly thought of as rows.
    Keys : is a technique to categorize data qualities. It is used to organize ER diagrams and assist users in modeling their databases to ensure that they are efficient. This is also used to connect different tables in a database.
    – Primary Key : identifies a single entity instance which means a unique attribute or set of attributes.
    – Foreign Key : is produced when data attributes has one to many relationship with other entities.

    ER Diagram Cardinalities:
    The styling of a line and its termination demonstrate cardinality and ordinality.
    The greatest number of times an instance of one thing can be related to instances of another entity is referred to as cardinality.
    While Ordinality refers to the fewest number of times a single entity instance can be linked to another.

  • Step 2: Determine the targeted users

    After the symbol familiarization, you’ll need to determine your targeted users. Your targeted users will be the ones to use your project.

    Your project is Employee Management System then your users would be the company admin and employees. You may ask the users of the common activities that they do when doing task in employee management. These information will help you in proceeding with the next step.

  • Step 3: Analyze the entities and their included attributes

    Analyzation is very important in creating ER diagram. It will help you understand the work of the diagram and avoid the unwanted errors.

    The gathered information from the users are very useful in creating the diagram. You will evaluate the data and pick the useful ones.

    From this, you will see the possible data that will enter and exit the system. But only include the useful data related to employee management. Then you’re ready for the next step.

  • Step 4: Plot the Entity Relationship Diagram

    To plot the ERD you will need the entities, their attributes, and relationships. You will base the data structure from the evaluated information to have the exact Entity Relationship Diagram.

    – To design the ER Diagram, you will list first all of the entities related to Employee Management System.
    – Then you will place the attributes included under them. This will help you create the ER Diagram Fields.
    – Do not forget the keys of the attributes. The keys will generate the potential relationships between entities.
    – Finally, you have your ER Diagram Completed.


It is essential for you to know the diagrams used to design and develop the Employee Management System. That is to help you create a fully-functional system with use of ER Diagram. Creating it will help you perceive the back end of the software. This will hold of all the data that’ll enter and exit the system.

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