In addition to the customer value-adding Epics and User stories you typically brainstorm in story writing workshops, the team needs to consider & plan for how to meet critical non-functional requirements that are also essential to the success of the product. These include things like performance, security, reliability, etc. To truly differentiate your product from the competition, think about NFRs not merely as compliance must-haves, but as distinguishing factors and essential contributors to the value proposition of the product. A big part of why our product is superior to the competition could be because it is more secure, more reliable, faster, etc.
NFRs include things like performance, flexibility, usability, maintainability, audit, logging, data migration, availability, reliability, recoverability, traffic/user volume, security, globalization/localization, etc.
In practice, we need to look at each of these non-functional requirements and answer 3 broad questions:
Let us take usability as an example: here is an excerpt of the Definition of Success for the Usability NFR from a team I coached recently:
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