Publisher Summary This chapter discusses the information control in fermentation development. The first stage in the process of informing is the generation of data. These can be defined, for the purpose of this review, as being raw experimental results, such as instrumental readings, analytical figures, and other first-hand observations. The second stage in the process is the converting of these in patterns that have useful meaning. The data is systematized, compared, collated, and otherwise worked upon to gain maximum interest summarized in the smallest compass. The Achievement of the clearest possible view of those experimental relationships with which the informant should be most concerned. The information generated may be specific to the activities and investigations. Equally, different information will be needed for their control. Briefly, the data must be treated in a manner appropriate to the way in which they will be used and to whom they may be useful. This is not to be thought of as a permanent structuring, even in one area of activity.