Evaluating A Selection of Tools for Extraction of Forensic Data: Disk ...

Figure 3.5. Process of evaluation criteria definition from Kontio (1996, p.4)
Weighting is assigned to each criterion in the previous stage and normalised into the
total of 1. Then the score is calculated based on the following formula:
Another method called AHP was also used to analyse the data evaluation. AHP is a
multiple criteria decision making method that decomposes the criteria into a
hierarchical structure. Each level of hierarchy will assign its importance factor by
comparing each item in the level in pairs. Finally, the alternatives will compare in
pairs again to determine their rankings. The one with the highest ranking is
recommended as the best alternative.
The reason for reviewing this article is that COTS evaluation has many aspects
that are of value to this study, starting from requirement specification to software
evaluation. The research process of OTSO is a logical development of a successful
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