Inspection Guidelines for Bridge Post-Tensioning and Stay Cable Systems Using NDE Methods (2017) / Chapter Skim
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D-1 Customizing the Decision Matrix A p p e n d i x d
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D-2 INTRODUCTION Several NDE technologies that were used for the condition assessment of the full-scale PT girder and the large-scale stay cable specimens have been considered in this investigation. They were also evaluated based on several weight categories and two sets of weight factors.
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D-3 Although the precision and accuracy categories have multi-dimensional parameters including deterioration conditions, the other categories (ease of use, inspection requirements, and cost) are not affected by the deterioration condition.
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D-4 Figure D-1. 3D decision matrix for scoring NDE methods in terms of precision and accuracy.
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D-5 Figure D-2. 2D decision matrix for scoring NDE methods in term of ease of use, inspection requirements, and cost.
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D-6 Figure D-3. Adding new Technology X to the 3D decision matrix for scoring NDE methods in terms of precision and accuracy.
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D-7 Figure D-4. Adding new Technology X to the 2D decision matrix for scoring NDE methods in term of ease of use, inspection requirements, and cost.
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D-8 technology, it should be added to the 2D decision matrix as shown in Figure D-6. Individual scores for every existing NDE technique would need to be computed based on the definitions of these new categories.
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D-9 Figure D-5. Adding new Category Y to the 3D decision matrix for scoring NDE methods in terms of precision and accuracy.
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D-10 Figure D-6. Adding new Category Z to the 2D decision matrix for scoring NDE methods in term of ease of use, inspection requirements, and cost.
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D-11 Table D-1. Categories and weight factors for Scenario 1 and Scenario 2.
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D-12 C7 Category Z W7 10% GUIDELINES FOR SCORING METHODS BASED ON CRITERIA Each category defines a specific relationship between the usefulness of the NDE method and a potential need in the structural engineering condition assessment process. In this investigation, the range of scores vary from 0 to 10, with 0 representing the lowest possible score (least desirable)
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