This is one of the definitions that I asw for user stories –
When the time has come for creating user stories, one of the developers (or the product owner in Scrum) gets together with a customer representative. The customer is responsible for formulating the user stories. The developer may use a series of questions to get the customer going, such as asking if some particular functionality is desired, but must be careful not to dominate the idea creation process.
In a large organization there could be multiple lines of business. For a particular line of business , there could be multiple applications (more than 10) that may be involved in fulfilling a business requirement. The requirement to each of these application teams could be provided by a business analyst and the high level solution could be formulated by a solution designer.
In scenarios such as these , would a single user story be defined for a specific change request that impacts multiple applications or would different user stories be created for each application? If it is a single user story then would a separate SRS be defined for each impacted application would it need to be associated with the user story defined?
2
The effect on contributing systems is irrelevant at the level of a user story. The user does not care how it works.
As a [user role], I want [something] so that [benefit]
Ex: As a [mobile phone customer], I want [buy a phone] so that [I can make phone calls].
Note the total absence of any mention for the need to build cell towers 😉
3