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Figure 4 Defect Grouping (Clustering) Example Figure 5 shows a typical defect cluster. Individual defects are identified by blue ovals, there are many defects close together, these have been grouped, and the group is identified by the orange rectangle, which defines the defect reported in the final defect listing. Therefore, a defect that is listed in an inspection report could be a single defect, or could be cluster of numerous real defects, as shown in Figure 5. Page 4 of 13 Copyright © 2007, Pigging Products and Services Association.
Cluster - Orange Individual defect - Blue Figure 5 Defect Grouping A typical defect listing is shown in Figure 6. In this case there is no differentiation between individual defects and groups of defects that have been clustered. Page 5 of 13 Copyright © 2007, Pigging Products and Services Association.
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