Entity Relationship Diagram - ERD - Software for Design
Crows Foot ER Diagrams
ER-model is used in a high-level (conceptual) design databases. You can use it to identify key entities and designate connections that can be established between these entities. During database design the ER model is converted into specific database scheme based on the selected data model (relational, objective, networking, or any other).
Crow's Foot notation was proposed by Gordon Everest, originally called Inverted Arrow. According to this notation, the entity is represented by rectangle containing its name. Name of the entity must be unique within this model. In this case, the name of the entity is a name of type, rather than a specific instance of this type. A concrete representative of the entity is called by the entity instance.
The entity attributes are written inside the rectangle depicting entity. Among the attributes is also highlighted the entity key - the set of attributes the values of which in aggregate are unique for each instance of the entity.
Relation is depicted by line which ties two entities involved in a relationship. The plurality of the relationship is indicated graphically by a "plug" on the end of the link. Optionality of a link is marked by a circle at the end of the link.
Entity-relationship diagrams based on both Chen's and Crow's Foot notations, can be easily drawn using the ConceptDraw DIAGRAM ERD diagrams software tools for design element Crow's Foot and Chen from Entity-Relationship Diagram (ERD) solution.
ERD Crow's Foot library from Entity-Relationship Diagram (ERD) solution contains 17 Crow's Foot notation symbols.
Example 1. Crow's Foot notation symbols
The shapes which include circles, bars, and symbols, indicate various possibilities. A single bar at Crows foot notation indicates one, a double bar indicates one and only one, a circle indicates zero, and a crow's foot indicates many.
Entity Relationship Diagrams (ERD) illustrates the logical structure of databases. The vector graphic diagrams produced when using the ConceptDraw ERD solution can be successfully used in whitepapers, presentations, datasheets, posters, or any technical materials.
Example 2. Entity Relationship Diagram Software
Design Elements — Crow's Foot (Windows, Macintosh).
The samples you see on this page were created in ConceptDraw DIAGRAM software in macOS and Windows using the Entity-Relationship Diagram (ERD) solution and show the ER Diagrams created with Crow's Foot notation. An experienced user spent 10 minutes creating each of these samples.
Use the Entity-Relationship Diagram (ERD) Solution for ConceptDraw DIAGRAM to create quick and easy your own Entity-Relationship Diagrams using the Crow's Foot and Chen's notations.
Example 3. Entity-Relationship (ERD) Diagram Solution
All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Entity-Relationship Diagram (ERD) Solution is available for all ConceptDraw DIAGRAM users.
TEN RELATED HOW TO's:
What's the best ERD tool for the Mac? ConceptDraw DIAGRAM on Mac OS X supplied with Entity-Relationship Diagram (ERD) Solution from the Software Development Area for ConceptDraw Solution Park is the best ERD tool! This solution offers for ConceptDraw users so powerful drawing tools, libraries with numerous ERD objects, which will help design ER diagrams of any complexity and any design you want.
Picture: What's the best ERD tool for the Mac?
Jackson System Development (JSD) is a linear method of system development created by Michael A. Jackson and John Cameron in the 1980s. It comprises the whole software life cycle directly or providing a framework for more specialized techniques.
When implementing the Jackson System Development method and designing JSD diagrams, you can succesfully use the powerful and helpful tools of ConceptDraw DIAGRAM software extended with Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park.
Picture: JSD - Jackson system development
Total quality management is the one known to be consisting of some organization-wide efforts put in order to install and to make some climate in which this organization can continuously improve its ability to deliver the high-quality products and services to its customers permanently.
Picture: Total Quality Management Definition
To maintain big and complex mechanical systems, you need an appropriate education and tools. It’s needless to say that mechanical drawing is important part of any industrial project. There are a lot of standard symbols depicting valves, pumps, motors, etc.
This drawing illustrates the content of the Fluid Power Equipment library provided by the ConceptDraw Mechanical Engineering solution. The solution is composed from the 8 libraries, containing about 500 elements related to mechanical engineering visualization. it will be helpful for drawing various schemes, charts and blueprints of pneumatic, and hydraulic equipment or other drawing related mechanical engineering. All drawings can be freely resized without loss of quality due to the vector graphics components of its facilities.
Picture: Mechanical Drawing Symbols
You need design a Finite State Machine (FSM) diagram and dream to find a powerful software to make it easier? ConceptDraw DIAGRAM extended with Specification and Description Language (SDL) Solution from the Industrial Engineering Area of ConceptDraw Solution Park is the best software for achievement this goal.
Picture: Finite State Machine
SIPOC is a tool that summarizes the inputs and outputs of one or more processes in table form.
You need to draw professional looking SIPOC Diagram quick and easy? Pay please your attention on ConceptDraw DIAGRAM diagramming and vector drawing software. Extended with Business Process Mapping Solution from the Business Processes Area of ConceptDraw Solution Park, it suits ideal for this.
Picture: SIPOC Diagram
Job duties in small companies are usually spread randomly among workers, causing lots of problems and misunderstanding. One of the ways to restore order in business processing is to create a cross-functional flowchart with swim lanes that would represent every step in production system. Another advantage of using swim lanes flowchart is that it represents not only processes, but people responsible for them.
Swim lane diagram is a kind of a process flow diagram. Its special feature is that it joins the features of process flow diagrams with organizational charts. Thus, a swim lane diagram display a participant of the business process in a conjunction with general flow of the business system. A swim lane diagram is looks similar to a swimming pool's lanes. Lanes can be horizontal and vertical. The lanes are pointed out relatively to resource name, which is assigned on implementation of the given part of the business process. ConceptDraw Business Process Mapping solution delivers the ability to design develop swim lanes flowcharts using the vector graphic objects of Swim Lanes library.
Picture: Swim Lane Diagrams
You are probably familiar with diagrams. But have you ever thought that they are useless? This article will explain you why.
Picture: Diagrams Mean Nothing
Describing a workflow or approval process can take hours and be too complicated, especially since there are options to do it quickly and vividly. Diagrams called flowcharts replace long paragraphs of boring text and represent information in a graphic way. You can draw one on paper or you can use flowchart software to do it quickly and scalable. This kind of software is easy to use and you don’t need any special skills to start using it. In addition, there are a lot examples and predesigned templates on the Internet.
Flowcharts are a best tool for staking out a huge and complex process into some small readable parts. Surely, flowcharts can be drawn manually but the use of standard symbols that make it clear for a wide audience makes a software tool preferred for this task. The core for a successful flowchart is its simplicity. That is why often before beginning making flowchart through software, people draw the sketch on a piece of paper. Designing an effective flowchart means the combination of the data needed to be shown and the simplicity with which you depict it.
Picture: Flowchart Software