Twelve distinctive daily work-styles concerning time-series working behavior were extracted from the result of the time-budget survey for knowledge workers by using a self-organizing map of the data mining technique. The extracted work-styles correlated with the workers' status. The workers tend to change and combine working place, content and co-worker based on the solo work on ones' desk particularly at the beginning and end of the office hours.
The presented method of incorporating the time-budget survey and the self-organizing map has possibilities to restructure a conventional office layout or a manner of operation, in terms of contributing to the office planning based on an evidence of current working behavior.