QUES:-Name one way that data and process modelling are similar. Explain how they are similar?
ANS:-Both process and Data model are very useful in understanding a system and both shows the working through systems. In both model, a data will typically undergo a series of transformation before it becomes the output. Both can have input data flow and output data flow. Data model that defined entities involved in the process.So, we can say that both are similar because both are explaining how system works.Although systems analysis for designing information systems shares much in common with business process mapping there are critical differences. Systems analysis methodology produces a logical model, which omits all extraneous detail (in a somewhat similar spirit to business process re-engineering). The approach is based on two views: entity-relationships for data modeling and data flow diagramming for representing functions (which is used in a similar context to process in BPR terminology).So, both are same in diagram Design method.
QUES:-Name one way that data and process modelling are different. Explain how they are different.
ANS:-Both are different in some way. PROCESS Model generally express theories predicting the nature of the exchange of energy and mass with in the system over time. BY CONTRAST, DATA Model express theories predicting the structure of the real world domain in terms of entities and their attributes organised in inter-related sets. Process model does not contain information about data stored and explain what system do rather than how to do. On the other hand ,data model shows how data stored and how system is being done ,give the logical view and explain its relationships among data.
