2.1.2. Keyword Co-Occurrence

The analysis based on keywords indicates that the network delineates a strong link between the terms "decision making", "equipment selection", and "mcdm" by including them in the same cluster, indicating that methods such as the AHP are often used for decision making. The terms "operator", "simulation", "decision attribute", and "fuzzy ahp" belong to the same cluster, indicating a sort of correlation. There is also a noticeable proximity between the terms "decision making" and "operator", indicating their strong linkage, even though they do not belong to the same cluster. The term "operator" is also close to "safety", "reliability", "knowledge", and "experience", which are significant factors affecting factors the operator's performance.

Some further implied conclusions from the network visualization analysis are the following:

