At the management control level where the desired performance is evaluated against the actual performance so as to take actions to eliminate unwanted deviation, the information need is usually such that would facilitate comparison between objective and performance. It may be necessary for example, at this level for the information manager to repackage to meet with the needs of each level. At the operation control level the information required is factual and detail reporting of periodic developments, operation or activities, such as number of books borrowed, number retuned per day. Such information has the characteristic of being cyclic because it is information that will be used and reused.