Performance Evaluation of Construction Sub-contractors using Ordinal Priority Approach.

Area of Science:

• Construction Management
• Operations Research
• Decision Science

Background:

• Construction projects rely heavily on sub-contractors, necessitating robust performance evaluation systems.
• Subjectivity in traditional sub-contractor evaluation leads to mistrust and conflict between clients, sub-contractors, and consultants.
• Existing methods struggle to objectively assess the performance of numerous sub-contractors in large-scale public projects.

Purpose of the Study:

• To introduce an objective methodology for post-qualification performance evaluation of construction sub-contractors.
• To address the subjectivity and mistrust inherent in current sub-contractor assessment processes.
• To propose a novel framework for standardizing sub-contractor performance evaluation.

Main Methods:

• Classification of perceived organizational performance into independent evaluation and self-evaluation streams.
• Application of the Ordinal Priority Approach (OPA), a multi-attribute decision-making methodology, for sub-contractor evaluation.
• Development of a Relative Performance Index (RPI) to standardize performance metrics.

Main Results:

• The Ordinal Priority Approach (OPA) enables simultaneous estimation of evaluation criteria weights, sub-contractor performance, and expert reliability.
• The proposed methodology effectively minimizes mistrust by identifying unreliable experts and inappropriate criteria.
• The Relative Performance Index (RPI) provides a standardized system for evaluating sub-contractor performance.

Conclusions:

• Objective post-qualification performance evaluation of sub-contractors is crucial for the construction industry.
• The Ordinal Priority Approach (OPA) offers a reliable and objective method for assessing sub-contractor performance.
• Effective evaluation necessitates assessing both sub-contractors and the experts conducting the evaluations for complete effectiveness.