International Journal of Academic and Applied Research (IJAAR)   Year: 2019 | Volume: 3 | Issue: 10 | Page No.: 42-52 The Impact of Documents Review on Improving of Management System According to Requirements of ISO: IEC 17025:2005 (A case study: NANO for Measurement and Calibration Center, Khartoum North-Sudan) Tayseer Elamin Mohamed Elfaki, Athar Mohamed Ali Elhussien Mustafa, Ammar M. S. Abdalla Abstract: This study aimed to identify the impact of documents review on improving of management system according to requirements of ISO: IEC 17025:2005, the study was conducted at NANO center for measurement and calibration and the samples were employees of NANO center for measurement and calibration. For the nature of the study, used the questionnaire as a data collection tool, 40 questionnaires were distributed and were all collected and data were analyzed using statistical package for the social sciences (SPSS). The study showed that there was a statistically significant relationship between the application of the methodology of the documents review and applying the documents in the quality system according to requirements for the competence of performance of calibration and testing laboratories, there was a statistically significant relationship between the application of the methodology of the documents review and number of cases of nonconforming in the quality system according to requirements for the competence of performance of calibration and testing laboratories and there was a statistically significant relationship between the application of the methodology of the documents review and continuous improvement in the quality system according to requirements for the competence of performance of calibration and testing laboratories. The study concluded that technical procedures should be reviewed by the technical manager of the center in order to ensure that they comply with the requirements for the competence of performance of calibration and testing laboratories to help in improvement of the service provided by the NANO center for measurement and calibration. The top management should also pay attention on identifying employees suggestions and taken them in the process of improving the quality system at the NANO center for measurement and calibration.