DATA HISTORY CONTROL PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a data control history processing method which performs with unitary control of the latest data, history data and future schedule data and can effectively retrieve and extract these data, about management of the data appearing irregularly. SOLUTION: This processing method includes a table 4 which stores the data including the data items of available period start time 24 and available period end time 25 and also stores a set of these data and a new data register means 11 which sets the time 25 of the immediately preceding data when the relevant data are registered and registers the set of data stores in the table 4 as the continuous data in terms of time. When those data are registered on the table 4, the end time 25 of the immediately preceding data is set so that the set of preceding data stored in the table 4 is equal to the continuous data in terms of time.