Purpose: This study aimed to investigate a fair method for evaluating employee performance in the manufacturing and service sectors. Theoretical framework: This research past concepts and theories that the researcher was able to summarize the guidelines for fair performance evaluation of personnel in the business sector have four components as follows: Evaluation Method, Support Factor, Assessor Characteristics and Data Insight. Design/methodology/approach:The study developed into a structural equation model and conducted as qualitative research with in-depth interviews with nine experts. Tools for quantitative research were created, and a group discussion with 11 qualified participants was held to reach a consensus on the model's certification. Survey information from a questionnaire administered to 500 business owners or executives in charge of manufacturing and services was used for quantitative research. And hierarchical linear multiple regression using SPSS and Structural Equation Modeling (SEM) technique was used to test the study hypotheses. Findings: The study adopts a confirmatory factor analysis to develop the structural equation model through data collection from in the manufacturing and service sectors, in Thailand Research, Practical & Social implications: The study which enables employers to operate smoothly by receiving benefits or profits according to the objectives of that enterprise. It is achieved when the commandant and subordinates can work together effectively and achieve peace in the industry. Originality/value: This study provides andoffersan academic reduce the turnover rate of employee and fair performance of personnel the manufacturing and service sectors in Thailand.