Determining the best intervention times of whole building assets for renewals during the planned period

The objective of service life analysis is to establish and explain the performance-over-time functions, which describes how the measured values of chosen performance characteristics are expected to vary with time. Applicable to buildings, the most viable method of capturing the performance is according to their condition; furthermore, referring to the minimum acceptable condition of the given building or component. Below this level, performance is considered not to be acceptable for the intended function, although the building or component can still be functional or operational. A deterioration curve represents the condition degradation over time, which can be regarded as a performance indicator over time. Referring to the deterioration curve produced regardless of deterministic or probabilistic way, the current study conducts a theoretical investigation of best intervention periods for renewals of whole building assets. Theoretical investigation is mainly underpinned by the relevant variables of the prediction curve such as useful life, remaining useful life, planned duration, minimum acceptable condition for performance, current year and last year of the planned duration and the first and last time that the intervention can be done effectively. Given that three interventions are the maximum number of interventions expected to occur during the planned period, eight scenarios of interventions come into effect. Hence, theoretical investigation has been applied to each scenario. The study has also used actual case study data hypothetically applied them to each scenario for further clarification of theoretical findings. The outcomes essentially guide building/ facility owners and managers for better informed decision-making of their building renewals.