Domain-Driven Design: Tackling Complexity in the Heart of Software

Combining Large-Scale Structures and Distillation
The concepts of large-scale structure and distillation also complement each other. The large-scale
structure can help explain the relationships within the 
CORE DOMAIN
and between 
GENERIC
SUBDOMAINS
.
Figure 17.6. M
ODULES
 of the 
CORE DOMAIN
 (
in bold
) and 
GENERIC SUBDOMAINS
are clarified by the layers.
At the same time, 
the large-scale structure itself may be an important part of the 
CORE DOMAIN
.
For example, distinguishing the layering of potential, operations, policy, and decision support
distills an insight that is fundamental to the business problem addressed by the software. This
insight is especially useful if a project is carved up into many 
BOUNDED CONTEXTS
, so that the model
objects of the 
CORE DOMAIN
don't have meaning over much of the project.
[ Team LiB ]

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[ Team LiB ]
Assessment First
When you are tackling strategic design on a project, you need to start from a clear assessment of
the current situation.
Draw a 
CONTEXT MAP
. Can you draw a consistent one, or are there ambiguous situations?
1.
Attend to the use of language on the project. Is there a 
UBIQUITOUS LANGUAGE
? Is it rich
enough to help development?
2.
Understand what is important. Is the 
CORE DOMAIN
identified? Is there a 
DOMAIN VISION
STATEMENT
? Can you write one?
3.
Does the technology of the project work for or against a 
MODEL-DRIVEN DESIGN
?
4.
Do the developers on the team have the necessary technical skills?