Table 1

Epistemic uncertainties for QA

Stages in the RLSCs of DWEpistemic uncertainties for QADescriptionThe level of uncertainties
Macro-levelMeso-levelMicro-level
Building dismantling and on-site processingAs-is conditions of the buildingThe difficulty in ascertaining the as-is condition of the building before dismantling  ✓
Management of contaminated/ hazardous substancesThe difficulty in managing contaminated/ hazardous substances during the dismantling stage  ✓
Health and safety concernsFears pertaining to health and safety due to operational and external factors  ✓
Workflow uncertaintiesThe workflow during the dismantling stage is uncertain due to the sophisticated task variability, interdependency, and analyzability  ✓
Management of sub-contractorsThe difficulty in managing and coordinating many subcontractors who engage in a building dismantling project ✓ 
Off-site waste processingProduct description complexitiesDifficulty in understanding and satisfying the end-user requirements of reprocessed products  ✓
Human errorsDue to its highly labor-intensive nature, the entire stage is highly vulnerable to human errors  ✓
Health and safety concernsFears pertaining to health and safety due to operational and external factors  ✓
Workflow uncertaintiesThe workflow during the dismantling stage is uncertain due to the sophisticated task variability, interdependency, and analyzability  ✓
Mixed waste from demolishersIf the mixed waste is received from demolishers, the waste processor’s entire business would be at risk ✓ 
Building dismantling and on-site processing and off-site waste processingRegulatory uncertaintiesFailure to forecast the actions of regulatory bodies and lapses in the influence strategies employed by them✓  
Incentivising uncertaintiesAvailability of insufficient useful information with the absence of incentivising by the external stakeholders of the RLSCs✓  
Contractual uncertaintiesUninformative and lenient contracts from forward supply chain (FSC) upstream and downstream actors do not provide useful information required for the RLSCs of DW.✓  

Source(s): Adopted from Wijewickrama et al. (2021a, 2022), Produced by author

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