12127537
Description
Mind Map by Rrshai Bekoe, updated more than 1 year ago
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Created by Rrshai Bekoe
almost 7 years ago
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Techniques and tools for Systems
Development.
- Entity Relationship Diagrams
- Shows all the entities
important to a system and
their relationships.
- Shows all the entities
important to a system and
their relationships.
- Entity Relationship Models
- A means of
showing the
relationships
of entities.
- A means of
showing the
relationships
of entities.
- Data Flow Diagrams
- Describes the flow of data
between entities in a system.
Processes explain what must
happen and arrows show the
destination of the data.
- Entity - represented by an oval
shape. The entity is anything
that is distinct and unique in
its existence. For example, a
person.
- Process - represented by a
square box with 3 areas. Top
left are is the unique process
ID. The top right shows who's
responsible
- Data Type is specified in detail the higher the level of this diagram.
- Describes the flow of data
between entities in a system.
Processes explain what must
happen and arrows show the
destination of the data.
- Information Flow Diagrams
- Used to show the flow of information in a
diagram linking entities and
external/internal parts of an organisation.
- Courtesy of uml-diagrams.org
- Courtesy of uml-diagrams.org
- Used to show the flow of information in a
diagram linking entities and
external/internal parts of an organisation.
- Data Dictionary
- A centralised store
of information.
- Can include data elements,
meanings, format, data types & entity
names
- A centralised store
of information.
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