Chronologies can be used in different ways. Many professionals, such as social workers, are required to maintain a Chronology for children on their caseload, to records all significant events and changes in the life of a child.
Also, as part of the process for Serious Case Reviews, agencies are required to draw up Chronologies relating to their involvement with children. These Chronologies are then brought together as an Overview Integrated Chronology, which can be used as an analytical tool to help understand the impact of events and changes on the child in question.
(Definition provided by tri.x)