5.2. Validation
The proposed model describes well the technical quality characteristics
as non-functional requirements and is applicable to the
most known M-learning applications. The column ‘comment’ in
Tables 2e5 shows that all the applications are concerned with the
concepts of the proposed model. This is supported by previous
research that supports the necessity for M-learning applications to
consider these technical quality characteristics alongside
nontechnical quality characteristics and functional requirements
mainly based on learning. Nevertheless, a model should consider
other nontechnical quality characteristics, namely educational,
pedagogical and social and business quality characteristics.