Preparing the Aid System for Industrial Network Oriented Diagnostics - New Contributions in Information Systems and Technologies - page 272

good results derived from the reasoning process. Knowledge acquisition process
should be done in such a way that the participation of the knowledge programmer
should be reduced to minimum [13]. Usually to prepare the knowledge reasoning
system we need to complete it in seven steps. Figure 4 shows that the first 4 steps
have to be realized by the expert or specialist by themselves (with support of specially
prepared paper form or e-form of questionnaires). Then the steps from 5 to 7 have to
be realized by the knowledge programmer. All results from every step has to be check
by the author of the knowledge database or the other responsible person [10,11].

Fig. 4. Stages of the knowledge acquisition process

Important task in the process of judgment of the collected knowledge is the
aggregation of many subjective marks into one objective parameter. Typically the
collected knowledge is judgment by the independent specialist, what is also a method
of collecting knowledge. Not only the rules come into the judgment but also the entire
knowledge database. The proposed method assume that the data is collected by the e-
forms and stored as a rules for judgment process in the database. In detail our
new method is described in the work [12], and we strongly recommend to get familiar
with this text also. In this article we show only sample of calculation: the operator
of aggregation basing on the geometry of the flat figures (like in fuzzy logic), which
can be circumscribe on collection of experts opinion, and we will call it - NP agfp (r).
Table 2 shows the calculated values of NP(r) .

Table 1. Collected values of degree of correctness of the rule [12]

Name of a convincing degree of
correctness - the answer provided by a
particular expert

Necessity
of the rule

Possibility
of the rule

Collected
value NP(r)

I absolutely agree 1,00 1,00 1

I surely agree 0,75 1,00 0,875

I rather agree 0,55 1,00 0,775

I do not have an opinion 0,00 1,00 0,5

I rather disagree 0,00 0,45 0,225

I surely I disagree 0,00 0,25 0,125

I completely disagree 0,00 0,00 0