Abstract
Purpose The purpose of this paper (Part 1 of 2) is to develop a systematic performance assessment model (PAM) for measuring facilities condition in terms of physical, environmental and operational impacts on performance. Design/methodology/approach The methodology entailed a review of literature to identify performance impacting factors (PIFs) of a facility. PIFs were categorized as physical, environmental and operational. Subsequently, 71 experts were interviewed to prioritize the identified PIFs in terms of their impact on facility performance via analytical hierarchy process (AHP) technique. A second round of interviews with 11 experts was conducted to set a utility scoring mechanism for the PIFs via multiattribute utility theory (MAUT) technique, the utility score in correlation to a set scale would describe the level of service(LoS). Finally, AHP and MAUT outputs were mathematically integrated to determine the final condition rating index of all PIFs and the whole facility as a result. Findings First, PIFs of a case study mosque facility under three scenarios with different groupings of functional spaces were defined. Functional spaces' prioritization was as follows: prayer hall (57%-65%), wet areas (25%-26%), minaret (9%-10%), and yard/site (7%-8%). Subsequently, each space's PIFs and its subcategories were assigned weights as well, the first level of PIFs' relative weights was as follows: physical (68%-73%), operational (19%-20%) and environmental (7%-13%). Physical PIFs weights differed per functional space but structural factor dominated with (38%-71%) relative weight except for the yard/site. Finally, a detailed condition evaluation mechanism for each PIF was defined. Originality/value This study contributes to facilities management industry and offers a systematic approach encompassing multiple PIFs that will regulate inspection then maintenance through desired corrective actions by facility managers to achieve desired LoS.