The IA Framework - Information Assurance Architecture - page 31

table 2.2 iA 2 principles

IA 2 Principle Definition

Actionability The resulting IA architecture guides or otherwise

supports actions to implement.

Adaptability Adaptable to align with many enterprise architecture

methodologies, e.g., Federal Enterprise Architecture
(FEA), Department of Defense (DoD), EA, etc.

Agility Strategic agility to accommodate evolving business and

compliance requirements, operating environments
(e.g., world economy); also, tactical agility to adapt to
dynamic nature of threat sources, motives, means,
methods, and opportunity.

BG 2 E Best, good, good enough principle; consider that any

solution may take the form of best, good, or good
enough, and that the customer may be completely
happy with any of these depending on business goals
and budget.

Business focus IA promotes and supports focus on business

requirements and business drivers; technology
supports business need, not business adapts to
technology du jour.

Complexity
management

Provide the ability to organize and deal with hard-to-
understand concepts, services, and mechanisms
inherent in enterprise solutions.

Consistency Provide a framework and process that produce

consistent results across multiple projects by multiple
architects.

Divisibility Divisible to segregate those aspects needed for the

current situation; note: similar to modular only
modular addresses the initial construction of IA 2
where divisible supports the need to decompose
modules into more granular parts.

Extensibility Extensible to accommodate unforeseen business

requirements; tomorrow's targets may not exist today;
the IA 2 F may encompass tomorrow's targets in
existing classifications and be flexible enough to take
on additional classifications.

Continued