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Data modeling with ConceptDraw DIAGRAM

One of the most difficult and important problems at software and data base projection is the definition of the requirements to the result. The more time is spent and the more attention is paid to the projecting software or data base, the simpler is the projection and the more qualitative is the result. The most frequently for definition of the requirements the method of data modelling is used.

In the given case data modelling presents the process of creation of data model in the convenient and comprehensible graphic form. In the process of model creation data is structured and organized with the usage of one of the methods, such as IDEF or ERD.

A creation of the model consists in collection of data which will be used in the projecting data base in the capacity of entities and other data base objects, in the definition of behavior rules of data in the system and operators which address to data in data base.

The model of data describes the structure of data in the given area. It contains the information about the classes of entities (for which the information is needed), attributes of this information and connections (including implicit) between entities and attributes of entities.

Entities are the objects of business-processes, real or virtual about which the information is collected and which are described in the model of data. For instance, entities can be all people having relation to the work of an enterprise. In their turn these entities are divided into classes. For example: “Clients”, “Suppliers”, Workers”. Each of the classes can be divided into subclasses by the given attributes. Classes are named with words of usual non technical language as well as connections between classes.

After the entity determination it is described with some definitions which are the attributes of the entity. Attributes must identify the entity, classify and appraise it qualitatively and quantitatively. Attributes can be obligatory and optional. For the entity “Worker” these can be individual data (name, age, and address), professional data (education, qualification, position) and so on. Attributes which originally define the entity are called primary.

After the definition of entities and their attributes in the model of data connections between entities and the type of these connections are defined. Connections can be unidirectional and bidirectional. Also the types of connections are distinguished: “one to one”, “one to many” or ”many to many”. Connections are called with verbal names. For example, between the entity “Worker” and entity ”department” there is a unidirectional connection of the type “One to one”. “Worker” works in the ”Department”. If consider the class of entities “Worker” the connection of this class with the entity “Department” will be of the type “one to many”.

The model of data describes semantics of data i.e. the set of confirmations about data which are used in the project.

The model of data can be presented in one of three forms:

  • Conceptual scheme- the description of semantics of data organization (entities classes and connections between these classes)
  • Logic scheme- description of data (tables, object oriented classes)
  • Physical scheme- description of physical environment of data keeping and processing

The more commonly used technologies of creation of such schemes are ERD (Entity Relationship Diagram) and some of IDEF standards (IDEF1, IDEF1x). Also for creation of schemes or diagrams which describe models of data it is possible to use special software such as ConceptDraw, where ready objects for creation of such diagrams exist. This lets you facilitate and accelerate the process of creation of such schemes and diagrams, creating diagrams which will be easy edited in the projection process.

Data modelling will help you to study and analyze business processes in your organization for optimization and increase of effectiveness and production.

Data modeling with ConceptDraw DIAGRAM  *

Venn diagrams are illustrations used in the branch of mathematics known as set theory. They show the mathematical or logical relationship between different groups of things (sets). A Venn diagram shows all the possible logical relations between the sets.Venn Diagram Examples for Problem Solving - Venn Diagram as a Truth Table
Picture: Venn Diagram Examples for Problem Solving.Venn Diagram as a Truth Table
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While creating flowcharts and process flow diagrams, you should use special objects to define different statements, so anyone aware of flowcharts can get your scheme right. There is a short and an extended list of basic flowchart symbols and their meaning. Basic flowchart symbols include terminator objects, rectangles for describing steps of a process, diamonds representing appearing conditions and questions and parallelograms to show incoming data. This diagram gives a general review of the standard symbols that are used when creating flowcharts and process flow diagrams. The practice of using a set of standard flowchart symbols was admitted in order to make flowcharts and other process flow diagrams created by any person properly understandable by other people. The flowchart symbols depict different kinds of actions and phases in a process. The sequence of the actions, and the relationships between them are shown by special lines and arrows. There are a large number of flowchart symbols. Which of them can be used in the particular diagram depends on its type. For instance, some symbols used in data flow diagrams usually are not used in the process flowcharts. Business process system use exactly these flowchart symbols.Basic Flowchart Symbols and Meaning
Picture: Basic Flowchart Symbols and Meaning
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The entity–relationship (ER) model is a data model that lets graphically represent the information system and depict the relationships between people, objects, concepts, places, and events within a given system. It is also convenient to use the ER Diagram for Cloud computing representation and description the Cloud computing architecture, design them with pleasure using the extensive tools of the Cloud Computing Diagrams solution from the Computers and Network area of ConceptDraw Solution Park.ER Diagram for Cloud Computing *
Picture: ER Diagram for Cloud Computing
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While designing a conceptual data model, you should use appropriate software. For instance, ConceptDraw DIAGRAM is a user-friendly ER diagram tool that has a lot of samples and templates to facilitate your work. A clear entity-relationship diagram helps to define the relations between system’s components. Software engineering is the section of a computer science engaged to design, realization, and support of complex software products. An ERD is a data modeling method that is widely applied in the software engineering practice. Commonly it is used for developing a structure of a a relational database. An entity relationship diagram is helpful for structuring and organizing databases that can be modeled using a relational structure. An entity relationship diagram is designed to depicts the interrelationships within the sets of entities which are accumulated in the database. Each entity represents a particular component of a data. Thus, ER diagrams depicts the logical structure of databases. ConceptDraw ER Diagrams solution provides software engineers with the professional tool for making entity-relationship diagrams.Entity Relationship Diagram Software Engineering *
Picture: Entity Relationship Diagram Software Engineering
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When trying to figure out the nature of the problems occurring within a project, there are many ways to develop such understanding. One of the most common ways to document processes for further improvement is to draw a process flowchart, which depicts the activities of the process arranged in sequential order — this is business process management. ConceptDraw DIAGRAM is business process mapping software with impressive range of productivity features for business process management and classic project management. This business process management software is helpful for many purposes from different payment processes, or manufacturing processes to chemical processes. Business process mapping flowcharts helps clarify the actual workflow of different people engaged in the same process. This samples were made with ConceptDraw DIAGRAM — business process mapping software for flowcharting and used as classic visio alternative because its briefly named "visio for mac" and for windows, this sort of software named the business process management tools. This flowchart diagram shows a process flow of project management. The diagram that is presented here depicts the project life cycle that is basic for the most of project management methods. Breaking a project into phases allows to track it in the proper manner. Through separation on phases, the total workflow of a project is divided into some foreseeable components, thus making it easier to follow the project status. A project life cycle commonly includes: initiation, definition, design, development and implementation phases. Distinguished method to show parallel and interdependent processes, as well as project life cycle relationships. A flowchart diagram is often used as visual guide to project. For instance, it used by marketing project management software for visualizing stages of marketing activities or as project management workflow tools. Created with ConceptDraw DIAGRAM — business process mapping software which is flowcharting visio alternative or shortly its visio for mac, this sort of software platform often named the business process management tools.Process Flowchart
Picture: Process Flowchart
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