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Types of Requirements

Business Requirements (BR)
Business Requirements (BR)

Business requirements in the context of software engineering or the software development life cycle, is the concept of eliciting and documenting business requirements of business users such as customers, employees, and vendors early in the development cycle of a system to guide the design of the future system.

Functional Requirements (FR) – Use Cases
Functional Requirements (FR) – Use Cases

Use cases approach is considered a more efficient means of collecting essential requirements, whereas functional requirements approach ensures a complete specification that can then filter out redundancies, overlaps, and unwanted features.

image: ccuart.org
Market Requirements (MR)
Market Requirements (MR)

But “Market Requirements Document” is a better definition, as this is a document that contains market requirements. MRD vs PRD At many companies, the MRD is used to create another document – the Product Requirements Document (PRD). PRD is then used by Engineering and QA teams to build the product.

Non-Functional Requirements (NFR)
Non-Functional Requirements (NFR)

Thanks for your feedback. To take the system from one state to another, you will need both functional and non-functional requirements. Typical non-functional requirements that are of importance in this case are usability and performance.

source: reqtest.com
UI Requirements (UIR)
UI Requirements (UIR)

A User Interface ( UI) is not a business requirement, which is what should be identified during the requirements phase, regardless of what type of methodology you are using in my opinion. The UI is not even a product, system, or software requirement, which is what most people (mistakenly in my ...