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loose coupling

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loose coupling

Refers to hardware and software components that interact when necessary, but remain uncoupled from each other. For example, computers in a network are loosely coupled. When the user's client machine requires data from the server, it sends a request to the server. Otherwise, it performs work independently. In a loosely-coupled multiprocessing environment, where several computers share the workload, a machine can be added and replaced without shutting down the entire system.

Software Loose Coupling
Loosely-coupled software means routines (modules, programs) are called by an application and executed as needed. For example, Web services employ loose coupling. When a function is required, the appropriate Web service module is executed. Loosely-coupled software often refers to programs with standard interfaces that serve multiple computing environments. Contrast with tight coupling. See Web services.



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Testing and validating policies and processes is critical because they often may conflict; and because of the SOA's loose coupling nature, it will be necessary to dynamically validate configurations or dependencies during deployment cycles.
The loose coupling between the rules implementations and its other software systems will deliver faster-time-to-market and increased quality by allowing Countrywide's Loan Servicing Division to develop, test, and deploy rules independently from other software.
In particular, the loose coupling of discrete services dictated by SOA can significantly increase the number of integration points for any given application, thereby increasing the potential for application failure.
 
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