Multidimensional small medium enterprises achievement rating: improving to data warehousing & data mining methods,the study gives a fully performed expert diagnostic system, which assesses the execution of SMEs on a benchmarking security. The system has been in practice for many years and has run into a consistent and considerably challenging development to suffice both the requirements of analysis and the generation of benchmarking records. The research explains why we chose to improve the system with data warehousing and data mining procedures.