SRS in Software Product Deleopment

The SRS (Software Requirements Specification) is necessary for software product development since the SRS is a description of a software system to be developed, laying out functional and non-functional requirements.

The detailed SRS with information on what the software product is to do as well as what it is not expected to do will reduce the need for future redesign of the software product.

The SRS is just a product requirements established by customer to a supplier. Here you can find one very informative article regarding the subject: How Product Requirements work in ISO 9001 https://advisera.com/9001academy/blog/2014/04/08/product-requirements-work-iso-9001/