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Tokede, O and Ahiaga-Dagbui, D (2016) Evaluating The Whole-Life Cost Implication Of Revocability And Disruption In Office Retrofit Building Projects. In: Chan, P W and Neilson, C J (Eds.), Proceedings 32nd Annual ARCOM Conference, 5-7 September 2016, Manchester UK. Association of Researchers in Construction Management, 321–330.

• Type: Conference Proceedings
• Keywords: disruption, office buildings, retrofit, revocability, whole-life costing
• ISBN/ISSN: 978-0-9955463-0-1
• URL: http://www.arcom.ac.uk/-docs/proceedings/79dcdf9080dc459e4707ebb0684a90f2.pdf
• Abstract:
  

  Retrofit buildings are becoming more popular in the United Kingdom and in most parts of the advanced economies.  Existing whole-life costing models have however, not proven to be robust enough to deal with building retrofit scenarios.  Recent research has made a case for the existence of revocability and disruption in building retrofit investments.  Revocability connotes the potential for variability in the running cost projections in a building over its estimated life. Disruption relates to the diminished building use or unusability over a period of implementing a retrofit initiative. This paper evaluates the whole-life cost implication of revocability and disruption in retrofit office building projects. Two case study projects are selected to appraise the potentials of revocability and disruption in office building projects. A number of building configuration permutations constituting different retrofit alternatives are developed in both projects. The potential implication of revocability and disruption are evaluated based on probability and fuzzy logic principles respectively. Based on the case study projects, it was found that the average cost of revocability relative to the initial capital cost can be up to 50% over a 20-year life, 63% over a 40-year life and 119% over a 60-year life. It was also found that the average cost of disruption relative to the initial capital cost can be up to 12%, irrespective of the estimated life of the office building project. Future studies will conduct sensitivity analysis on the respective whole-life cost models and assess the relative preference of building retrofit configurations in office building projects.