Industrial output in August dropped 3 percent from the previous month, a downward revision from a preliminary decrease of 2.2 percent, the Ministry of International Trade and Industry said in a report released Oct. 17.The production index for the nation's mines and factories, which takes 1990 as a base year of 100, stood at a seasonally adjusted 100.4. This represents a 3.4 percent increase from a year ago, according to the report.The operating level at industrial facilities for the reporting month came to 87.8, down 2 percent from the previous month, the report says. The shipments index fell 2.1 percent to 102.5, compared with a 1.8 percent month-on-month decrease in the preliminary report. The inventory index rose 0.4 percent to 111.7, an upward revision from a preliminary rise of 0.2 percent.