2.11.3 Pragmatic approach to research mixed methods
The pragmatic approach to science involves using the method which appears best suited to the research problem and not getting caught up in philosophical debates
about which is the best approach. Pragmatic researchers therefore grant themselves the freedom to use any of the methods, techniques and procedures typically
associated with quantitative or qualitative research. They recognise that every method has its limitations and that the different approaches can be complementary.
Alzheimer Europe, 2009
2.11.4 Advocacyparticipatory approach to research emancipatory
To some degree, researchers adopting an advocacyparticipatory approach feel that the approaches to research described so far do not respond to the needs or situation of
people from marginalised or vulnerable groups. As they aim to bring about positive change in the lives of the research subjects, their approach is sometimes described as
emancipatory. It is not a neutral stance. The researchers are likely to have a political agenda and to try to give the groups they are studying a voice. As they want their
research to directly or indirectly result in some kind of reform, it is important that they involve the group being studied in the research, preferably at all stages, so as to
avoid further marginalising them. Alzheimer Europe, 2009
2.12 Development Methodology
Types of Software developing life cycles SDLC or Development Methodology.
2.12.1 Waterfall Model
The waterfall Model is a linear sequential flow. In which progress is seen as flowing steadily downwards like a waterfall through the phases of software implementation.
This means that any phase in the development process begins only if the previous phase is complete. The waterfall approach does not define the process to go back to
the previous phase to handle changes in requirement. The waterfall approach is the earliest approach that was used for software development.
Figure 2.18 Waterfall Model.
2.12.2 V-Shaped Model
It is an extension for waterfall model, Instead of moving down in a linear way, the process steps are bent upwards after the coding phase, to form the typical V shape.
The major difference between v-shaped model and waterfall model is the early test planning in v-shaped model.
Figure 2.19 V-Model.
2.12.3 Evolutionary Prototyping Model
It refers to the activity of creating prototypes of software applications, for example, incomplete versions of the software program being developed. It is an activity that
can occur in software development. It used to visualize some component of the software to limit the gap of misunderstanding the customer requirements by the
development team. This also will reduce the iterations may occur in waterfall approach and hard to be implemented due to inflexibility of the waterfall approach.
So, when the final prototype is developed, the requirement is considered to be frozen.
Figure 2.20 Evolutionary Model.
2.12.4 Spiral Method SDM
It is combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. This model of
development combines the features of the prototyping model and the waterfall model. The spiral model is favored for large, expensive, and complicated projects. This
model uses many of the same phases as the waterfall model, in essentially the same order, separated by planning, risk assessment, and the building of prototypes and
simulations.
Figure 2.21 Spiral Model source: ianswer4u.com
2.12.5 Iterative and Incremental Method
Kategori