Statistical Data Analysis(SDA)is considered to be aprocess which extracts some“productive”findings from data through certain filter of thoughts or statistical viewpoints. The substantial SDA has provided heartwarming stories based on the data. However, it seems to us that recent drastic progress of computer, including desktop computer, promotes having made the SDA into instant and tasteless process. In order to cope with these tendencies, we at first appeal the inherent attractions of the SDA, considering it as unified process. The SDA consists of three elements, namely, data, methodology and analyst including statistician. In practice of the SDA, these three elements get interwined, and can not be treated independently. Thus, it is important that implication of the SDA be flexible and adaptive. Consequently, the second purpose is to introduce the principles and procedures of data investigation, and data-adaptive methods that can Hexibly take into account some diagnoses in each stage of the SDA process. It gose without saying that skills of the analyst, or in other words, technical aspects play important roles in the SDA. Finally, we pigeonhole remarks or rules of thumb that are required in applying statistical methods to each stage of the SDA, and consider qualification of appropriate analyst.
