IMPLEMENTATION AND TURNOVER - IBM Mainframe

After testing is complete, the application is really for production. Before accepting the system, most installations conduct an acceptance test, in which the users of the system test the system under typical operating conditions. In addition to giving the programs a final checkout, this ensures that the user documentation is clear and understandable. Error handling, backup procedures, restart and recovery procedures, etc should be included as a part of the testing. Upon successful completion of the acceptance test, the system may be used for production immediately. Alternatively, the system may be phased in, one piece at a time. Or, it may be run in parallel with the system it replaces to ensure that it gives identical results. When the user is convinced that the new system is behaving as desired, the old system can be phased out.


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