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Which UML diagram types are in most demand?
- From a recent spot check of over 500 job postings on Indeed.com that mention both “UML” and “diagram”, the following picture emerges:
- There is clearly a Big 4 of UML diagram types, and they are – in order of frequency –
- sequence,
- use-case,
- activity and
- (the only structural diagram type that “counts”) class diagram.
-
UML Diagram Type Count of type activity 19.33% class 15.33% communication 6.00% component 2.67% interaction 1.33% network-architecture 1.33% object 2.00% sequence 23.33% state 8.00% timing 0.67% use-case 20.00% Grand Total 100.00% - It seems you could in practice cover “80%’ of UML with these four diagram types. Even state and communication (collaboration) diagrams are an already very distant 5th and 6th (but get you up to a coverage of about 95%).
- Notably, the majority of UML diagram types – at least in this sample set – do not figure at all:
| Count of type | Diagram |
| 0 | Behavioral state machine |
| 0 | Collaboration use |
| 0 | Composite structure |
| 0 | Deployment |
| 0 | Information flow |
| 0 | Interaction overview |
| 0 | Internal structure |
| 0 | Manifestation |
| 0 | Model |
| 0 | Package |
| 0 | Profile |
| 0 | Protocol state machine |
Note: The vast majority of mentions did not need any, but I attempted some translations of the raw data on indeed.com:
| indeed.com | counted as |
| action | activity |
| collaboration (1) | communication (2) |
| data flow | information flow |
| domain model | class diagram |
| object models | object |
| state charts | state machine |
| process flow | 1 not counted |
| swim lane | sequence |
| prototypes | 1 not counted |
Categories: service-is-documenting
UML
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