Project Initiation Note (PIN)
This document describes proposal and overall plan to develop a new software product.

Business Requirement Document (BRS)
This document consists of complete and correct requirements to develop the new software product.

Software Requirement Specification (SRS)
This document specifies how to develop the new software.

High Level Design (HLD)
This document specifies overall architecture of software in diagrammatic notation. This document is also known as “Architectural Design”.

Low Level Design (LLD)
This document describes internal logic of every module or functionality in a diagrammatic notation.

The process of verifying the correctness and completeness of PIN, BRS, SRS, HLD & LLD
Review Process