UML and SDL Modeling Languages

Why Build Models? Large systems are too complex to understand at once. – A model abstracts crucial aspects of the problem. – A model omits incidentals and details. A precise, well-chosen notation prevents misunderstandings. Important questions can be asked early with the model. A model can be the basis for a design and implementation. Modelling IS design!

What UML Is A modelling language A notation proposes a standard for technical exchange of models and designs Can be simulated What SDL Is Defines a “ meta-model ”

What UML Is Not It is not a method or methodology does not dictate a particular process Choose a process for a particular project, independent of the modelling language can be used to fast prototyping What SDL Is Not can be used to record the resulting domain and design models, independent of the process

Why Use UML? Standardized notation without sacrificing specialized model data Common language that can be used from product conception to delivery, from system to detailed design levels Reduced learning curve across projects Increased domain and design model reuse Increased customer involvement /understanding of problem translation to product solution Why Use SDL?