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integrated DMI/model design option (1) <br />The advantages and disadvantages of the are: <br />Advantages Disadvantages <br />No intermediate files. Must modify model input/output <br />? ? <br />(I/O) code. <br />Access to current data. Model now depends on database. <br />? ? <br />Low-level DMI routines can be Changes in database require model to <br />? ? <br />shared between models. be recompiled (not a big <br />disadvantage). <br />Possible to generate better I/O Database response may be slow. <br />? ? <br />event-handling if advanced GUI is <br />being considered. <br />I/O can be standardized through <br />? <br />DMI routines. <br />flat file DMI utility option (2) <br />Advantages and disadvantages of the are: <br />Advantages Disadvantages <br />Model does not require I/O Potentially complex DMI utility mus t <br />? ? <br />changes. be developed for each model's input. <br />Updates to models are easier. Potentially complex DMI utility mus t <br />? ? <br />be developed for each model' s <br />output. <br />DMI routines can be share d Changes in data (e.g., real-time data ) <br />? ? <br />among DMI utilities. require that the utility be run often. <br />Model can run in stand-alon e <br />? <br />mode (possibly at remote sites). <br />A method equivalent to (2) mus t <br />? <br />be done in the first step of portin g <br />a model. <br />2 <br />A275 01.08.95 1.05-8 Malers <br />