By Milan Kratochvil, Barry McGibbon
ISBN-10: 0521892422
ISBN-13: 9780521892421
Company managers usually locate it very unlikely to speak company pursuits and specify their software program specifications to technical individuals of employees. This beginner's advisor to the Unified Modeling Language (UML) - the traditional for documenting software program designs - teaches readers to speak with software program builders in a extra centred, powerful manner. It describes the elemental diagrams of the UML modeling notation and indicates how they're used to specify requisites in an unambiguous manner. whilst utilized on a undertaking, the danger of failure via doubtful necessities is got rid of. while you are a non-technical individual with a stake within the good fortune of a software program venture, this booklet is for you. Milan Kratochvil has labored as an IT-consultant, teacher and author in method for almost twenty-five years, targeting parts the place IT and company intersect. Barry McGibbon is a important advisor for Princeton Softech.
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Extra resources for UML Xtra-Light: How to Specify Your Software Requirements
Example text
Later, a state diagram showing the entity life cycle tells the desired 'dynamic' story per class, for example, for the Customer-order class in our example. Thus, use cases triggered on the same occasion are usually related, whereas use cases affecting the same entity at different points in time aren't related. [12] Also, if you build application software, rather than an access control utility, actors from the use-case view needn't correspond to classes in the structural view either. Parameterized Use Cases At the moment, neither UML nor the tools support parameterized use cases.
The core is a mainstream system use case, which is often outlined quite explicitly by the processowner or reengineer. Figure 3-1. A system use case can be related to several actors, as is the case in Pay Drink Account. An actor can be related to several use cases, as is the case with Web Customer. From this mainstream system use case, others appear in the structure linked by use-case relationships (the dashed arrows in the diagram). These related use cases - let's call them mini-use cases - represent complementary activities that are either less usual or common interactions reappearing in other use cases.
Use cases are simply the ways in which the actors use the system. A similar step is natural in any knowledge industry because exact requirements minimize lead time and misunderstandings. Use Cases Human-computer interaction (HCI) is a vast field, to which use cases contribute with a practical, down-to-earth technique for the doers. To end users of the planned solution, the user interface often seems to be the entire system. Use cases extend this simplified view by modeling what's going to happen at the user interface, as well as interfaces to other systems.
UML Xtra-Light: How to Specify Your Software Requirements by Milan Kratochvil, Barry McGibbon
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