BRD and SRS:
BRD stands for Business Requirements Document, while SRS stands for Software Requirements Specification. Both documents are used in software development projects to define the requirements of the software that is being developed, but they differ in their focus and level of detail.
Business Requirement Document:
The BRD is typically a high-level document that outlines the business objectives of the project and the high-level requirements that the software must fulfil in order to meet those objectives. It describes the business processes that the software will support, the stakeholders involved, and any regulatory or compliance requirements that must be adhered to. The BRD is typically written by the business analyst in collaboration with stakeholders from across the organization. BRD is prepared during the initial phases of the project. BRD is an output of requirements elicitation.
Created by: Business Analyst.
Used by: Project Stakeholders.
System Requirement Document:
On the other hand, the SRS is a detailed document that specifies the functional and non-functional requirements of the software system in much greater detail. It typically includes detailed use cases, data models, system interfaces, and other technical specifications that developers can use to build the software. The SRS is typically written by the technical team, including developers and architects, and is often used as a contract between the development team and the stakeholders. The SRS is prepared after requirements are gathered and BRD is prepared. BRD serves as one of the bases to prepare SRS. Detailed requirements are prepared and documented by elaborating and refining the business requirements from the BRD.
Created by: Technical team(typically) / Business Analyst.
Used by: SMEs / Technical leads.
BRD vs SRS
In summary, the BRD is a high-level document that outlines the business objectives and high-level requirements of the project, while the SRS is a detailed document that specifies the functional and non-functional requirements of the software system. Both documents are important for ensuring that the software development project meets the needs of the business and its stakeholders. BRD consists of business requirements which are written in a layman language so that anyone reading the document can understand the context of the document whereas SRS consists of requirements written with technical jargons and documented using UML diagrams like Use case diagrams and data flow diagrams.