Unformatted text preview: structure chart . There are two main principles of structured design : Program modules should be (1) loosely coupled and (2) highly cohesive. Loosely coupled means that each module is as independent of the other modules. Highly cohesive means that each module accomplishes one clear task. The structured analysis technique helps the developer define what the system needs to do (the processing requirements), what data the system needs to store and use (data requirements), what inputs and outputs are needed, and how the functions work together to accomplish tasks. The key graphical model of the system requirements that are used with structured analysis is called the data flow diagram (DFD) . A model of the needed data is also created based on the types of things the system needs to store information (data entities) about. The data modeling is done with the entity-relationship diagram....
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- Summer '14
- Computer program, Structured programming, structure chart, structured analysis, structured approach