It is well known that most of mission critical
systems like defense systems demand higher quality
than general software systems. In order to assure the
high quality of the systems, those software systems
must be thoroughly tested with well defined testing
processes. As software systems evolve, software testing
should also be improved with continual-base. Even if
there are some previous researches on test process
model, those models have some limitations and
problems to be applied for software testing process
improvement in a specific domain like military weapon
systems. In this paper, we propose a new testing
maturity model, called MND-TMM(Ministry of
National Defense-Testing Maturity Model), which can
be adopted effectively for the weapon software system
development. We also present OWL ontology for the
MND-TMM, called MTO(MND-TMM Ontology) to
help software organizations set up their effective
testing strategies and improve their testing processes,
which can lead to high quality product developments.