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A use case model is a logical model.
Each actor on a use case diagram represents a role
A role is a set of related activities executed by one or more people in the organzation. A role is not a specific user, although in some organizations a single person may execute a function leading you to believe that the function is user specific. This is simply a case of a role that is only executed by a single person.
A use case essentially outlines a process, for example withdraw money is a use case that exists for an ATM. Withdraw money is execucted by the role customer. Withdraw money can be executed many times.
Both actors and use cases are abstract and therefore are not physical models.
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What is a logical use for global variables?
Storing global data.
What is the difference between use case model and use case diagram?
Use Case diagrams are behavior diagrams of UML used to describe a set of actions (Use Cases) that some system or systems (Subject) should or can perform in collaboration with one or more external users of the system (Actors).Each use case should provide some observable and valuable result to the actors or other stakeholders of the system.Use case diagrams are a means for specifying:(external) requirements on a system under design, required usages of a system - to capture what a system is supposed to do;the functionality offered by existing system -- what system can do for clients;requirements the specified system poses on its environment - by defining how environment should interact with the system so that it will be able to perform its services.
What is the meaning of and in C programming language and when is it used?
logical and: exp1 && exp2 means: exp1==0 ? 0 : exp2==0 ? 0 : 1
How do you draw a use case diagram for store management system?
use case dig for store mgt
Get the Use-case diagram for online banking?
i want use case diagram for online banking system
What is the purpose of a scientific model?
The main purpose of a scientific model is to represent empirical objects, physical processes and phenomena in a logical and objective way.
Which technologies use token passing method and a physical star but logical ring topology?
token ring uses a physical star and a logical ring ,while FDDI uses a physical star/ring and a logical ring.
What is difference between logical file and physical file?
* Physical file (PF) contains the data and have only one record format. Logical file (LF) is a view of the physical file which does not contain any data may be based on one physical file or more then one physical file. Logical file can have more then one record format. Logical can be non join or join logical file. Performance becomes better if you use the logical file in the program.
What kind of model would you use to represents the human's heart?
The type of model you would use to represent your human heart would be a physical model.
Which technoloigies use token passing method and a physical star but logical ring topology?
Token Ring
What technology can you use to provide logical separation and protection between hosts that are on the same physical network?
VLAN
What are the four basic parts of a use case model?
The four basic parts of a use case model are actor, use case, system boundary, and relationships between actors and use cases. Actors are users or systems interacting with the system, use cases represent user goals or tasks, the system boundary defines the scope of the system, and relationships show how actors interact with use cases.
What is the use of mathematics in physical science?
Physical chemistry is used a lot in this case
SONET uses which topology?
SONET use RING physical topology and TOKEN logical topology. As simple as that. Logical topology deals with the data transmission. Physical topology deals with how the network is connected physically , BUS, RING, STAR and the like.
What is the Logical drive and physical drive?
* Physical file (PF) contains the data and have only one record format. Logical file (LF) is a view of the physical file which does not contain any data may be based on one physical file or more then one physical file. Logical file can have more then one record format. Logical can be non join or join logical file. Performance becomes better if you use the logical file in the program.
Virtual memory refers to your computers swapping of data currently in use between what types of memory?
explain the logical& physical memory
Draw a physical and logical data flow diagram for Indian railway reservation?
please use www.google.com i also help of google
