Abstract
Object-oriented systems development life-cycle methodologies are highly iterative in nature. They use top-down decomposition and bottom-up synthesis techniques concurrently. Complemented by a suitable notation, they provide a powerful framework in which flexible and reliable systems can be built. Here, an appropriate life-cycle methodology and notation are reviewed briefly and then used to develop and document the design of a cost-management system for a wastewater treatment plant that requires the integration of economic and engineering models.
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