| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently gather and store data and to utilize the data over the longer period of time. SOLUTION: Process data are gathered by a data input part 11 in a fixed cycle, only the data with the large change of the process data are extracted as data of a storage object by a data filter part 15. The data with the small change of the process data are considered as equivalent to the data of a previous cycle and are not defined as data of the storage object, and the extracted data of the storage object are stored in a data storage part 12. When data retrieval is requested from a client, the data of a retrieval request are extracted from the stored data in a data extraction part 13 and the process data are developed into an original form in a data development part 16 and delivered to the client.</p> |
