4.3 Results of the ISM Approach
Interaction between RE practices and the key knowledge areas is
determined using the ISM method. Many academic researchers have used a
similar methodology to investigate the contextual interaction of
elements [40-43,
47]. ISM method helps in presenting a
complex system in a simplified way, provides an interpretation of the
embedded object, and transforms unclear and poorly articulated mental
models of systems into visible, well-defined models, thereby helping in
answering what and how in theory, building facilitates the
identification of the structure within a system
[40-43,
47]. A structural-self-interaction
matrix (SSIM), as provided in the following sections, is required to
develop the contextual interaction between the criteria.