the problem space in chunks (domains) is described within this paper. The progressive
updating of the ontology due to evolving nature of the problem space is discussed by using
the initial validation results from the focus groups.
Objectives
A set of high level objectives are derived through analysis of the CWG workshop discussions
and prior meetings with the CWG ontology work stream members:
• Objective 1: to develop a sector-independent ontology by extracting and classifying
information from case studies across heterogeneous domains to explicitly specify the
concept of capability engineering.
• Objective 2: to develop an information model from the ontology that is to be informed
by the capability engineering activity model to support the ‘management of
knowledge’ within the context of capability engineering.
• Objective 3: to evaluate (verify and validate) the ontology through expert reviews and
application to a case study.
The next section discusses the current ontology-based approaches and proposes a flow chart
for the development of the capability engineering ontology.
Ontology-Based Approaches
Ontology-based modelling for information and knowledge management has been widely used
(Hughes et al. 2009; Duan et al. 2009; Dongmin et al. 2010; Liu et al. 2010). Generally, an
ontology is defined as an explicit specification of a conceptualisation where concepts and
their relations are extracted from the real world (Studer et al. 1998; Duan et al. 2009). An
ontology-based approach is complementary to more conventional modelling approaches such
as Unified Modelling Language (UML) and Systems Modelling Language (SysML) because
an ontology is significantly useful in defining a domain from multiple author perspectives
and terminologies. Allemang 2008 elaborate one of the tenets of the Semantic web “AAA;
Anyone can say Anything about Any topic”. In contrast to conventional modelling, ontology
model has formalisms and associated inferencing that facilitate bringing multiple user
perspectives and vocabularies together. However, like conventional modelling, it also
focuses on the key concepts, i.e. “what is”, as in, “what is capability engineering and how is it
different from other engineering domains?”. The classes and relationships typically
associated with the model can also be added.
A single shared ontology for capability engineering can enable semantic interoperability and
support a formal and explicit specification of a shared conceptualisation. As recommended by
Unshold and Gruniger (2004) when developing a practical single shared upper ontology, the
mapping of ontology amongst domains and the eight different worldviews identified by the
INCOSE UK CWG (e.g. equipment, organisational and service centric worldviews) needs to
be human assisted rather than fully automated to achieve the interoperability,
interconnectedness and correlation desired between these heterogeneous domains. The
ontology shall also form tight definitions and be independent of industry sector and
applications. These are discussed later within the requirements analysis section.
A variety of methods, methodologies, tools and languages for ontology development have
already been analysed by various authors (Corcho et al. 2002; Mizoguchi 2003; Mizoguchi