Requirement

• What is Requirement?

Requirement is something which the customer expects from IT system to solve business,user problem or optimize the business process.

• What are different types of requirements?

1. Business Requirements - This type of requirement is always the goal or target of the whole project. For e.g. Bank decides to provide RTGS Tranfer service to its customers(Business Decision). Now, Bank need to have infrastructure setup before marketing the same service. Implementing RTGS in the bank IT system would be the business requirement. It is directed from the top stakeholders in business.
2. Functional Requirement - This type of requirement would define the behavior of or change in IT system so as to achieve the project's business requirement. For e.g.Implementation of RTGS would require certain business logic to be introduced in IT system which would fall under the category of functional requirement. It is derived after analyzing the business requirement and current functional logic in IT system.
3. User Requirement - This type of requirement outlines how the system would interact with the user or vice versa. It would include the requirements to provide Interface between logic introduced in IT system and the User. It is always derived from the User of IT system. For e.g. Design of screens to perform business operations.
4. Quality Requirement - This type of requirement outlines the quality of services the IT system provides. For e.g. time taken by system to process and produce the output after the input  is provided by the user. Users of system and other requirements would help derive this requirement.
5. Implementation Requirement - This type of requirement outlines what package of solution need to be introduced in the current IT system to achieve the project's business requirement. For e.g. List of all objects(Programs, Tables etc) need to be introduced or modified to achieve all the above mentioned requirements. All the requirements mentioned above in collated form would produce Implementation requirements(complete) at the end of the project.