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.' Metropolitan Water Supply Investigation Proposal Hydrosphere, Inc. Septmber 17, 1993 Page 54 Cost The initially estimated budget for this task is $12,000. Model Development Purpose The purpose of this task is to develop a model for use in the MWSI Project to investigate the yield and operational aspects of a variety of system integration opponunities at a reconnaissance level. In addition, the act of model creation forces a fonnal evaluation of the implementation techniques-both from a modeled perspective and that of real life-associated with the modeled system. This latter purpose of model creation is often overlooked in the rush to inspect modeled data but it is a valuable output from model creation in and of itself. especially with new proposed systems where the real life implementation is not fixed and can be investigated using the model. The model will be developed either as a new model or as a modification of existing modeling tools such as Denver's updated model. Methodology and Evaluation Techniques The basic course of development will be largely detennined during the scoping and specification phase of the Study. The functional specification developed in Task 9 will serve to determine more exact requirements needed prior to commencing this task. If a new model is detennined to be needed, the model will be developed as an application of Hydrosphere's CRAM modeling tool. If a modification to Denver's model or some other existing model is the selected procedure. Hydrosphere will work with others to effect such modifications, with the exact roles of the various panies to be detennined as the Study progresses. The model will be developed to maximize its compatibility with Denver's modeling efforts with regard to such things as study period, natural hydrology, etc. The model will be tested and validated against a known "baseline" scenario of existing water rights, operating procedures, facilities and demands. An elaborate calibration and validation effort is not anticipated since the MWSI Project model will be used for preliminary investigations, and any promising water supply options will be "proven out" using other capabilities (i.e. Denver's model). Once the baseline system has been created, integration opponunities will be modeled "on top or the baseline system. Interestingly, integrated system operations are often easier to model because legal and physical constraints present in the baseline model are removed from the baseline modeled assumptions. Fast track software development is best accomplished by providing a detailed specification of the desired capabilities, the functional specification, and then following an iterative prototyping approach until the desired final product is created. This is the suggested approach for the MWSI model given the time and budget constraints associated with this project. Quality assurance and quality control are an important pan of any software project regardless of the development method. Testing should first be undertaken at the software module level ("unit testing") and proceed upwards to the entire product ("system" or