The core data within ServiceLogic comprises the contract, location and plant register with supporting tables for data validation and analysis. ServiceLogic caters for unlimited contracts with the ability to attach multiple contracts to each location with unlimited plant/equipment entries per contract per location. Location records should be unique and technologies are included to alleviate the creation of duplicate location records together with block location import facilities. The plant records maintained specialise in the collection of heating appliance characteristics. The system caters for the maintenance of the Landlord Gas Safety related data to allow the production of the Landlord Gas Safety Certificate if required. Comprehensive details are retained on each plant item facilitating detailed reporting and statistics. Scheduling of planned maintenance can be achieved by location or plant item for domestic and commercial contracts. Comprehensive pricing and frequency with full history of services and reactive calls to plant item level.