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Created by: Christine Anderson Class: ENPM641 Lance Anderson Prof: Mark Austin Date due: November 11, 1999 Subject: Homework #2
The following is a use case study of SDRC, Statistical Dynamics Research Corporation, which is a computer network for computer aided design and manufacturing. The actors involved are as follows:
This computer network facilitates design and manufacturing by allowing an actor to share models, data files. These models are stored in projects, and when an actor wants to access a model they can check-out or reference a model into their own managed bins. See Diagram #2 The actor is then able to use this model to complete their work. To verify the state of a model in their managed bins, an actor can check the status field in the managed bins. Actor: Design engineer Objects: Model files, Project, Library, Workstation Design engineers utilize this computer network as a tool for design. They can model their theoretical design be creating an assembly. This assembly can then be analyzed to determine whether or not the design is valid. Since this assembly is composed of many different parts, and interference check can be performed on the assembly to determine if there may be a fit problem between parts. The assembly can also be compared to the engineering specifications to make sure that all of the requirements are met. If the above criteria are met, the engineer can be reasonably sure that they have created a working assembly. see Diagram 3. Actor: Design engineer Objects: Model files, Project, Library, Workstation After a working assembly has been created, the manufacturing engineer must process the assembly in order to build the final product. see Diagram #4 The design engineer must review the process carefully to insure that the assembly is manufactured correctly. The flat patterns from the part in the assemblies must be analyzed to determine if the part is manufactureable and to select the proper material sheet size. The process requirements must be compared against the available manufacturing resources and the process must be checked against the drawings to insure that the assembly has been processed properly. Actor: Design engineer Objects: Model files, Project, Library, Workstation, 2-D Drawing Data file management is another important aspect of the computer network, since many different people are in contact with the system. Engineering services is responsible for maintain security over the filing system by locking and unlocking files in active projects. They are also responsible for transferring new files to active projects where the users may share them. Through managed items the users are then able to review the protection status and location of the files. see Diagram #5 Actor: Engineering services Objects: Project, Library, Workstation, 2-D Drawing
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