A diagram is a simplified and structured visual representation of concepts, ideas, constructions, relations, statistical data, anatomy etc used in all aspects of human activities to visualize and clarify the topic.

Basic diagram types

• Tree diagram
• Graph
• Matrix
• Network diagram
• Flow
• Set
• Exploded view

Specific diagram types

A

• Activity diagram – from UML

B

• Bachman
• Booch – used in software engineering

C

• Cause-and-effect diagram
• Circuit diagram
• Class diagram – from UML
• Collaboration diagram – from UML 1.x
• Communication diagram – from UML 2.0
• Commutative diagram
• Component diagram – from UML
• Composite structure diagram – from UML
• Cross-functional flowchart

D

• Database Model Diagram
• Data Flow Model diagram
• Data-structure diagram
• Dependency diagram
• Deployment diagram – from UML
• Dot and cross diagram

E

• Entity-Relationship diagram (ERD)
• Euler diagram
• Express-G

F

• Feynman diagram
• Flowchart – schematic representation of a process
• Fusion diagram

G

• Gantt chart – shows the timing of tasks or activities (used in project management)
• Grotrian diagram

H

• Hasse diagram
• Hierarchy diagram
• Histogram

I

• IDEF0
• IDEF1 (entity relations)
• Interaction Overview diagram – from UML
• Ishikawa diagram

J

• Jackson diagram
• Johnston diagram

K

• Karnaugh map

L

• Line of balance

M

• Martin ERD
• Mind map – used for learning, brainstorming, memory, visual thinking and problem solving

N

• Nassi-Shneiderman diagram or structogram – a representation for structured programming
• Nomogram

O

• Object diagram – from UML
• ORM diagram
• Organisation

P

• Package diagram from UML
• PERT
• Petri net – shows the structure of a distributed system as a directed bipartite graph with annotations
• Piping and instrumentation diagram (P&ID)
• Phase diagram
• Pourbaix diagram
• Process Flow diagram or PFD – used in chemical engineering
• Program Structure diagram

R

• Rich Picture

S

• Sequence diagram from UML
• SDL/GR diagram – Specification and Description Language. SDL is a formal language used in computer science.
• Shlaer-Mellor – used in software engineering
• Smith chart
• SSADM – Structured Systems Analysis and Design Methodology (used in software engineering)
• State diagram
• Swim lane
• System structure
• Systematic layout planning

T

• Timing diagram – from UML
• TQM diagram

U

• UML diagram – Unified Modeling Language (used in software engineering)
• Use case diagram – from UML

V

• Value stream mapping
• Venn diagram
• Voronoi diagram

Y

• Yourdon-Coad – see Edward Yourdon, used in software engineering

See also

• Category Diagrams
• Diagramming
• List of graphical methods with a mathematical basis.

Infographics

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