IT Department Overview of Responsibilities
Governance refers to the implementation of operational parameters for working units and individuals' use of IT systems, architecture, and networks. The governance of the master data is based on workflow processes that integrate business rules and subject matter domain expertise. This is part of the conventional IT security as well as the data assurance for which the IT department is also responsible.
Infrastructure refers to the hardware components, the network, the circuitry, and all other equipment necessary to make an IT system function according to the established needs and system "size" of the company.
Functionality is perhaps the most apparent task performed by the IT department. It refers to creating and maintaining operational applications; developing, securing, and storing electronic data that belongs to the organization; and assisting in the use of software and data management to all functional areas of the organization.
The IT department oversees the installation and maintenance of computer network systems within a company. This may only require team IT employees in the case of larger organizations. Its primary function is to ensure that the network runs smoothly.

 

IT Network
The IT department must evaluate and install the proper hardware and software necessary to keep the network functioning properly. This includes working within a budget that allocates the amount of money the company can afford on network devices and software. The IT department must make sure that the equipment it invests in both optimally serves the needs of the company without going over budget.
Networks can be simple or extremely complex depending upon their size and composition. In addition to staying current on trends within business technology, employees may require college degrees in a computer field to adequately handle the issues that arise in maintaining such a network.

Application Development
Quite often, companies see the main role of the IT department as creating the applications that serve its core business needs. The right applications allow a business to be innovative, more productive, efficient, and to move ahead of its competitors. In many ways, this makes the IT department crucial to the success of a business.
The expertise necessary to create the applications that can set a business apart from the others requires an IT department with programmers, analysts, interface designers, database administrators, testers, and other professionals. These employees become quite knowledgeable about the operations of the business itself. As a result, they become valuable to other departments outside IT.

Technical Support
Employees are familiar with having to contact the IT department for computer support. The IT department provides this service for all the users who need access to the company's computer systems. This might entail installing new software or hardware, repairing hardware that has become faulty, training employees in the use of new software, and troubleshooting problems with the system or with an individual's computer. 
It's apparent that not all the IT department does is apparent - it creates and maintains so many systems that go unseen or unrecognized by employees. These services, however, are integral to the success of a business. Though they may not be appreciated when business is running smoothly, their importance is greatly recognized when something goes wrong.

Company Website
The IT department is responsible for creating and maintaining the company's website. It designs the layout, creates the code, and tests the site for usability. Depending upon the needs of the company, the IT department can design the site for information only, or create a completely interactive commercial site that can sell products directly to consumers.