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<br />17i,.'" ;"):-J <br />, : liJ:UJ\,)N:''ilYi <br /> <br />fhe Resident Power and Reservoir System Model (PRSYM) <br /> <br />Model Testing <br /> <br />Model testing is required throughout development and implementation stages. Initially, <br />utilizing simple test cases, it must be documented that model algorithms behave as expected. <br />For example, it should be verified that mass is conserved, that water leaving one reservoir <br />arrives at the next, that reservoirs releasing water generate power, etc. <br /> <br />Documented model calibration is also required. The user (i.e., TVA for the first model <br />application) will supply the necessary test case data to adjust system parameters to ensure <br />that the model behaves in accordance with actual operations for the same forcing hydrology <br />and control policies. <br /> <br />Model validation must also be conducted and documented, whereby the model's accuracy is <br />tested on independent sets of data. This could involve running the model in parallel with the <br />reservoir system for a period of time and/or utilizing historical data. These tests should <br />include a range of hydrologic conditions, including low, high, and normal inflow conditions. <br />The user will be responsible for providing the necessary data and operational experience to <br />support these tests. <br /> <br />Software Quality and Performance <br /> <br />The PRSYM software should be developed with consideration to quality and performance <br />characteristics such as speed, ease of use, maintainability, extensibility, and elegant and <br />efficient connection to the DSS. These characteristics cannot be specified nor tested <br />quantitatively. Therefore, in order to ensure that the software is of acceptable quality, TV A <br />will perform software quality reviews at 2-month intervals during the development and <br />provide the subcontractor with written evaluations. These will include specification of areas <br />in which improvements are required, as well as areas which have been reviewed and are <br />deemed of acceptable quality. <br /> <br />Model Documentation and Technology Transfer <br /> <br />The PRSYM model, both in terms of its code and application, must be thoroughly <br />documented. The minimum documentation will include: <br /> <br />· A Technical Overview of the general modeling approach, algorithms, and <br />simulated processes. This document should be written from an engineering <br />perspective. <br /> <br />· A User's Manual describing the models' features, controls, and application, <br />including use of input/output data; definition/manipulation of the network, <br />functionality, or operating rules; etc. The document should include sample <br />problems to illustrate the models' use. The User's Manual should be in the form <br /> <br />3-16 <br />