The advantages of plant utilisation in off-highway activities such as construction, mining, forestry, etc can never be over-emphasised. As a result of the enormous demand placed on this valuable resource, documentation has become a paramount requirement in their effective utilisation. Such documentation relate to inventories, maintenance records, costs, utilisation and breakdown records, etc. This book presents the development and application of INTELLIPLANT, a web-based system plant information management system. The system evolved as an integration of a web-based Relational Database Management System (RDBMS) and a Model Base Management System (MBMS). The RDBMS was designed from forms collected during a pilot/ field investigation, while the MBMS emerged from the assemblage of time series models developed from a rigorous analytical procedure of historical records. INTELLIPLANT has the capacity to generate over 20 real-time history reports on-line through its RDBMS structure.