Issue 18046: Location: 18.1.3 Semantics Use Cases and Actors	P. 685 - Actors need not initiate (uml25-ftf)
Source: Soluta.net (Dr. Adriano Comai, acomai(at)soluta.net)
Nature: Uncategorized Issue
Severity: Significant
Summary: current text: “Each UseCase specifies a unit of useful functionality that the subject provides to its users (i.e., a specific way of interacting with the subject). This functionality, which is initiated by an Actor, must always be completed for the UseCase to complete.”

[AC] I think the clause “which is initiated by an Actor” is wrong, according to the use case theory formulated by Jacobson, where each use case must provide value to an actor, but not necessarily be initiated by an actor, because there are also time-triggered use cases.

What's more, this clause does not correspond to any constraint in the metamodel. So, even if it was also in the  11-08-06 version, I suggest to remove it

Resolution: 
Revised Text: 
Actions taken:
September 28, 2012: received issue
Discussion: 
Note this is independent from 18.003, which says there must be at least 1 actor. This suggests removing the text requiring an actor to initiate.

Michael Jesse Chonoles

End of Annotations:=====
s is issue # 18046

Problem: 18.006

Severity: Medium 
Type: Method Inconsistency 
Location: 18.1.3 Semantics             Use Cases and Actors     P. 685
Title: Actors need not initiate
 
Description:
 
current text: .Each UseCase specifies a unit of useful functionality that the subject provides to its users (i.e., a specific way of interacting with the subject). This functionality, which is initiated by an Actor, must always be completed for the UseCase to complete..
 
[AC] I think the clause .which is initiated by an Actor. is wrong, according to the use case theory formulated by Jacobson, where each use case must provide value to an actor, but not necessarily be initiated by an actor, because there are also time-triggered use cases.
 
What's more, this clause does not correspond to any constraint in the metamodel. So, even if it was also in the  11-08-06 version, I suggest to remove it
Source: Adriano Comai
 
Discussion: 
 
Note this is independent from 18.003, which says there must be at least 1 actor. This suggests removing the text requiring an actor to initiate.
 
Michael Jesse Chonoles