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Modeling Tool Definition

The modeling tools of computer systems, are tools that are used for the creation of system models that already exist or that will be developed.

The modeling tools, allow to create a "simulation" of the system, at low cost and risk at a low cost because, after all, it is a set of graphics and texts that represent the system, but they are not the real physical system (which is more expensive).They also minimize the risks, because the changes that are they must be made (due to errors or changes in the requirements), they can be done more easily and quickly on the model than on the system already implemented.

The modeling tools allow you to concentrate on certain important characteristics of the system, paying less attention to others.The results models are a good way to determine if all the system requirements are represented, as well as to know if the analyst understood what the system will do.

A system informs This may require different modeling tools, which will result in different types of models.The modeling tools used depend on the analyst, the type of system, the requirements, etc.

Some modeling tools

* Data flow diagram.* Relationship entity diagram.* State transition diagram.* Data dictionary.* Process specification.* HIPO and IPO diagrams.* Class diagram.

Expected characteristics of a modeling tool

Good modeling tools meet certain characteristics:

* They allow a downward vision of the system.* They allow partitioning of the system.* They have components graphics with some textual support.* The result model should be transparent (easy to understand).* They have minimal redundancy (increasing redundancy, decreases the transparency of the model and increases maintenance).

Balancing

A system can be modeled using multiple modeling tools.Each tool results in one or more diagrams (or schematics) that represent the complete system or part of the system.

Each diagram "helps" the other, allowing a better understanding of the part of the system.modeling system.

The balancing between diagrams is the task of checking the consistency between the different diagrams of the system.This task can be manual or automatic.When checked, the diagrams are said to be balanced.

The balancing of diagrams allows to discover and correct errors, inconsistencies or missing.

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