Abstract
The method Schroeder is accepted amongst real estate professionals in Switzerland as a near standard for condition monitoring, budgeting of maintenance and refurbishment, and strategic decision support in point of building portfolios. It is based on the devaluation curves of 12 or more building elements. Main results are the actual and the prognosticated future building condition in percentage of its reinstatement value, the residual useful service life of building elements, and the calculation of future maintenance and refurbishment costs. 25 years after its first publication, this paper analyses the assumptions made, compares the method to other methods in this field, and validates the method in several steps, based on scientific or empirical evidence. Furthermore, a desktop simulation of a well-documented portfolio was performed and compared, the answers from a questionnaire amongst users are provided, and the partially controversial conclusions are discussed.
Highlights
In every economy and organisation, the existing building stock forms an indispensable and major asset which needs to be maintained, improved, and eventually replaced
The method Schroeder is accepted amongst real estate professionals in Switzerland as a near standard for condition monitoring, budgeting of maintenance and refurbishment, and strategic decision support in point of building portfolios
Maintenance and refurbishment decisions for building portfolios are more based on user requirements and market considerations than on predicted durability of building elements
Summary
In every economy and organisation, the existing building stock forms an indispensable and major asset which needs to be maintained, improved, and eventually replaced. This requires a measurable part of the gross domestic product (GDP) and has to be performed in an economical manner by optimising between minimal costs and avoiding a maintenance backlog while considering aspects of sustainability. As a consequence of the importance of the existing building stock, budgeting of maintenance and refurbishment is a commonplace as well as challenging task for property owners and managers. Maintenance and refurbishment decisions for building portfolios are more based on user requirements and market considerations than on predicted durability of building elements.
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