If the card is invalid, the pump returns it before fule is dispensed.Petrol Pump Management System Class Diagram describes the structure of a Petrol Pump Management System classes, their attributes, operations (or methods), and the relationships among objects. the credit card is returned after debiting. An activity diagram is a behavioral diagram i.e.
When fuel delivery is complete and the pump hose is returned to its holster, the driver’s credit account is debited with the cost of thr fuel taken. A uml diagram is a diagram based on the uml (unified modeling language) with the purpose of visually representing a system along with its main actors uml diagrams, in this case, are used to communicate different aspects and characteristics of a system. UML Diagram Maker is a cross-platform uml diagram and ERD design program which is compatible with Mac OS X, Windows and Linux systems. The lottery numbers are selected only by a state lottery system not by the.
The driver may then take the fuel requried. The use case diagrams above reflect a gas station business that currently.
Drivers swipe their credit card through a reader connected to the pump the card is verified by communication with a credit company computer and a fuel limit is estiablished. preparing an emergency plan if the quantity of a class of hazardous chemical. ♦ A petrol (gas) station is to be set up for fully automated operation. The WHS Regulations implement a system of chemical hazard classification.
Use your own experience to decide on the attributes and operations that schould be associated with the objects: A telephone, A printer for a personal computer, a personal stereo system, A bank account, Alibrary catalogue.ġ4.7 Do Sequence diagram for peterol station only. These reasons lead to a design that may be readily modified.ġ4.4 Using the UML graphical notation for object classes, design the following object classes identifying attributes and operations. The following diagrams show the relationships between tables that the system.
If the objects are loosely coupled “it is usually straightforward to introduce new objects without significant effects on the rest of the system”. “Changing the internal details of an object is unlikely to affect any other system objects”. 14.1 Explain why adopting an approach to design that is based on loosely coupled objects that hide information about their representation schould lead to design that may be readily modified.Īns.