LACE frameworks and technique-identifying the legacy status of a business information system from the perspectives of its causes and effects

This paper first presents a definition of the concept ´legacy status´ with a three-dimensional model. It then discusses LACE frameworks and techniques, which can be used to assess legacy status from the cause and effects perspectives. A method of applying the LACE frameworks is shown and a technique with a mathematical model and metric so that the legacy status of a system can be calculated. This paper describes a novel and practical way to identify legacy status of a system, and has pointed out a new direction for research in this area.