This report is an initially study of the whole processes in the manufacturing aims to capture the current problems into groups of categories and prioritize the problem solving according to the frequency of the defects detection, the root causes are indentified and assessment of FMEA on the problems occurrence. Research method is performed by interviewing the key persons who are representatives from the units, then use tools of quality improvement to analyze each step (Affinity, Pareto, Ishikawa and FMEA). Conclusion of the study found that Burapha Wood Company is currently facing with three categories of problem, those are Machinery, Competency, Timber Drying and others with the list of problem are consisted.The Two sided planer machine is a first prior to be undertaken of solution. Where the root causes are ignorance of workers not follow the machine's instruction in such of reset the machine before operating and the record form has not filled when problems occurrence.