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All cases of using a system are the case diagram. In these charts, it is important, except in cases of use, to visualize the system users involved in each case. Users queue management software are depicted as schematic sticks. The relationship between the user and the use case is illustrated with a line between them which is good not to have any direction to avoid misinterpretation. For the order management system, the usage case is shown in the figure. The definition of a usage case includes all the possible behaviors, including normal or basic flow where everything is expected to be done by the user for achieving the goal and all alternative flows, for example, something that differs from normal behavior. A usage case is successful when it specifies only what is the behavior of the system without any reference to how it is achieved, without describing technical implementation details.
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In the case of use, to create in cooperation with the end users, drafts of the expected graphical interface, which are referred to in the literature as prototypes. In this context, the graphical interface prototypes used should be referenced by a name rather than queue management solution abstract ex, the user enters the Plate Display name of the dish and not the user enters a screen. However, there should be no reference to technical or design details as the purpose of using early samples of the graphical interface is solely to investigate customer requirements. Finally, it is noted that at the stage of recording cases of use it is often tedious to search for all possible alternative flows that can be displayed in a usage scenario. However, it is particularly important to investigate this at this stage rather than at a later stage such as design queue management or implementation. The timely formulation of all requirements is much cheaper and safer than modifying the plan or code then. Various standards have been proposed in the literature to document cases of use. Standards can be grouped into three general categories. Simple text descriptions without a particular click here structure. Supporters of this standard emphasize that cases of use should focus on customer requirements and not involve the system analyst in other unnecessary activities. It is suggested that the description should not exceed the two paragraphs per usage case. This template is then used to document the use of the order management system. More extensive descriptions expressing what the basic flow is and what are the alternative flows. Typically, numbering is used for each user s action or system response.
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In the case of alternative flows, the corresponding number is used to denote the stage of the use scenario where it is applied. One such example is In the verbal description of the following cases of use, reference is made to monitors of the system to be developed. Drafting of interfaces monitors is part of the requirement's analysis, where we try to show the future system user the expected behavior of the software system under development. These plans are not queue management solution a detailed and accurate depiction of the graphical user interface that will eventually have the software to be developed.
They are simply considered to be a means for the best possible concentration between the end-user and the analyst in order to clarify the functionality and to clarify any uncertainties in the requirements. The display screens presented at this stage are not analytical IE not all keys, fields, colors, messages, etc. as this would be binding on implementation, which is not desirable at the stage of analyzing the requirements. Also, screens do not cover all interfaces between the user and the system but the interfaces that are deemed to be explored. These screens can be created either with graphic design tools, either with fast prototyping languages that allow for easy graphical interface development, or even as drafts that can be scanned.
The following is the documentation of the cases of use of the Order Management System according to the first and second models. The analysis is based on the high level standards that were formulated by the customer, as well as on hypothetical clarification of uncertainties carried out in collaboration with the end users of the queue management software system. For simplicity, the alternate streams recorded are limited.