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Can you explain SRS and its key elements?

SRS is Software Requirement Specification a document that describes what the software will do and how it will be expected to perform. It also describes the functionality
that product needs to fulfill all stakeholder needs.
SRS is a descriptive note about the software that is under development. It is documented by the developer of the software for the clients and users and describes the purpose of software. It gives a detailed overview
of software product, its parameters and goals.
Software Requirement Specification is a system requirement specifications which explains detail features of document or application. The word SRS itself explains its use to provide functionality required by its stakeholders and its customers.
As well, it gives detailed idea on requirements and system/software behavior, key performances on system.

Importance of SRS is as follows:
SRS is a descriptive note about the software that is under development. It is documented by developer of software for clients and users and describes purpose of software.

Key Elements of SRS are as follows:

Functional Requirements- This requirements explain list of requirements and its functions.

Business Model- This system explains that system will support, it includes organizational context, stages diagram that explains present state and future state.

Constraints- This section gives idea of any design constraints that have been imposed by the customer, hence removing certain options from being considered by developers. Constraints are limitations placed on the project manager and
that team must work within. If in case any false or defect found, then SRS document would need to be re-evaluated to make sure that documented requirements are still valid.

Non-Functional Requirement- Non-Functional requirements specify the softwares quality attribute, as well it helps to understand the system performance. These requirements are specified by software developers, aarchitects, and technical persons.
The impact of non-functional requirements is not on the functionality of the system, but they impact how it will perform.

Purpose and Project Scope- What are the benefits, goals and objectives we intend to have for this product? Why the product is neccessary, its purpose and what value it will provide to customer is described and explained. It also includes a description
of development cost and time required. This also involves abbrevations, definitions and the acronyms used.

Assumption- Assumption help us to understand when the product will fail or not operate perfectly. This explains on requirement engineering has been done on requirements communicated by customers and assumptions made if any during gathering and analyzing
requirements of customer, if in case any false assumptions made or found during this, SRS will be re-evaluated and validated using validation techniques.

Acceptance Criteria- Acceptance criteria give details of criteria defined for accepting the project by customer while his final sign off documentation, this will give and end to testing stage and also provides quality assuarances, or in an agile methodology
at the end of each iteration.

Technical Requirements- Technical requirements are explained in detail, what software is going to use, how same will get executed, etc. plays crucial role in any software which allows easy and on point execution of requirements.

Provides non-functional requirements that gives quality of system.

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