Concurrent Engineering Model ~ A cdf framework for aerospace engineering education ios. Process models. Concurrent engineering vs traditional approach. Cs b software engineering ii introduction ppt do. The concurrent development model, sometimes called concurrent engineering The concurrent process model can be represented schematically as a series of.
Software requirement analysis 2. Design: Software design is a multistep process that focuses on four distinct attributes of a program: data structure, software architecture, interface representations, and procedural (algorithmic) detail. The design process translates requirements into a representation of the software that can be assessed for quality before coding begins.
Code Generation: The design must be translated into a machine-readable form. The code generation step performs this task. If design is performed in a detailed manner, code generation can be accomplished mechanistically. Testing: Once code has been generated, program testing begins. The testing process focuses on the logical internals of the software, ensuring that all statements have been tested, and on the functional externals; that is, conducting tests to uncover errors and ensure that defined input will produce actual results that agree with required results.
Support: Software will undergo change after it is delivered to the customer. Change will occur because errors have been encountered, because the software must be adopted to accommodate changes in its external environments or because the customer requires functional or performance enhancements. Model assumes the requirement of a system which can be frozen (baseline) before the design begins. This is possible for systems designed to automate an existing manual system.
But for a new system, determining the requirements is difficult as the user does not even know the requirements. Hence, having unchanging requirements is unrealistic for such projects. Freezing the requirements usually requires choosing the hardware (because it forms a part of the requirement specifications). A large project might take a few years to complete. If the hardware is selected early, then due to the speed at which hardware technology is changing, it is likely the final software will use a hardware technology on the verge of becoming obsolete. This is clearly not desirable for such expensive software systems. Model stipulates that the requirements be completely specified before the rest of the development can proceed.
In some situations it might be desirable to first develop a part of the system completely and then later enhance the system in phases. This is often done for software products that are developed not necessarily for a client, but for general marketing, in which case the requirements are likely to be determined largely by the developers themselves. Model is a document driven process that requires formal documents at the end of each phase. This approach tends to make the process documentation-heavy and is not suitable for many applications, particularly interactive application, where developing elaborate documentation of the user interfaces is not feasible.
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Also, if the development is done using fourth generation language or modern development tools, developing elaborate specifications before implementations is sometimes unnecessary. Business modeling: Here we try to find answers to questions like what information drives the business process. What information is generated?
Who generates it? Where does the information go? Who processes it? Data modeling: Here the information flow which would have been defined as part of the business modeling phase is refined into a set of data objects that are needed to support the business. Process modeling: The data objects defined in the data modeling phase are transformed to achieve the information flow necessary to implement a business function. Processing descriptions are created for adding, modifying, deleting, or retrieving a data object.