1 INTRODUCTION
There are more than 2.2 million of SMEs1 in Thailand which represent around 99% of all enterprises, and the majority is in manufacturing sector [OSMEP, 2008]. These SMEs play an important role in Thai economics in term of labor employing, making value-added of raw materials/products, exporting, etc. Many of these SMEs were driving their business based on their empirical experiences and skills. Since the economic crisis and the floating of Thai currency in the last decade, many SMEs have been collapsed. As well as the impacts of FTAs (Free Trade Agreements) and the globalization (global market, global manufacturing) have made rapid changes to business environment. Thus, only the empirical experiences and skills are not sufficient to stay in a high competitive environment as nowadays.