Analysis of the CoCoSo Method for Selecting Cleaning Staff at SMK Negeri 2 Ulu Moro'o School

Abstract

At SMK Negeri 2 Ulu Moro'o, the selection of cleaning staff has been done manually, without written standards and clear assessments, making it subjective and difficult to justify. The purpose of this research is to implement and analyse the Combination of Compromise Solution (CoCoSo) method, which is used as the basis for a Decision Support System to select cleaning staff. The Rank Order Centroid (ROC) method evaluates six qualities: cleanliness results, discipline and attendance, responsibility, attitude and communication, safety compliance, and education and experience. To evaluate candidates, CoCoSo is used through min-max normalisation, weighted sum and weighted multiplication calculations, three compromise assessment strategies, and final scores. The sensitivity test of the parameter λ and the Spearman rank correlation against the Simple Additive Weighting (SAW) method were used to test the consistency of the results. The calculation results for the eight candidates show that candidate A2 received the highest final score of 3.2235, followed by candidate A4 with a score of 3.0999 and candidate A6 with a score of 3.0294. The first rank remains stable across all λ values from 0.1 to 1.0, and the CoCoSo ranking is highly consistent with SAW (ρ = 0.9286). Therefore, the ROC–CoCoSo method can be used as a tool to help select fair, honest, and accountable cleaning staff in the school environment.