CRS (Customer Requirement Specification) VS SRS (Software Requirement Specification)

 

Criteria	CRS	SRS
Definition	Outlines the high-level needs and expectations of the customer.	Defines the detailed functionalities, features, and constraints of the software.
Focus	Customer-centric, emphasizing business goals and objectives.	System-centric, detailing how the software will meet customer requirements.
Audience	Primarily intended for the customer or stakeholders.	Mainly targeted at developers, testers, and other members of the development team.
Level of Detail	Generally less detailed, providing an overview of customer expectations.	Highly detailed, specifying every aspect of the software functionality.
Scope	Broader scope, encompassing overall business needs and goals.	Narrower scope, concentrating on the technical aspects of software development.
Modifiability	Subject to change as per customer feedback and evolving business needs.	Changes to CRS should be minimal; modifications are typically part of change requests.
Contractual Agreement	May not serve as a contractual agreement but influences contract terms.	Often forms the basis of a contractual agreement between the client and the development team.
Language	Uses non-technical language understandable to a wide audience.	Contains technical language and specifications suitable for developers and testers.
Timeline	Created early in the project, before detailed system specifications.	Developed after the CRS, providing detailed technical requirements for software development.
Dependencies	Dependent on business goals, market trends, and customer expectations.	Dependent on the CRS and focuses on how to implement the functionalities specified.
Changes Over Time	More susceptible to changes as customer needs evolve.	Changes are generally less frequent once the SRS is finalized.
Business Goals	Aligns with overall business goals and objectives.	Translates business goals into technical requirements for implementation.
Acceptance Criteria	Provides a broad overview of what the customer considers acceptable.	Provides specific criteria that the software must meet for each requirement.
Traceability	Traced back to business objectives and customer expectations.	Traced back to the CRS and business goals to ensure alignment.
Feedback Loop	Feedback from customers or stakeholders is crucial for revisions.	Feedback is more internal, often involving developers, testers, and project managers.
Legal Implications	May not have significant legal implications but influences project direction.	Forms the basis for legal agreements and contracts between the client and the development team.
Objective	Outlines what the customer wants to achieve with the software.	Defines how the software will meet customer expectations and business objectives.