Risk Based Inspection (RBI) / Risk Based Maintenance (RBM) software for oil, gas & chemical  plant and power plant, in accordance with API 581 new generation, code compliant Risk Based Inspection (RBI) software for optimising plant inspection and maintenance evaluates an API 581 compliant risk profile for the plant provides run length indexes (RLI) in generic manner covering all damage mechanisms for each equipment item the risk and RLI are combined to output safe inspection and maintenance intervals formally designed for use by plant personnel such that implementation is not dependent on external consultants future integration with TWI's CrackWISE and IntegriWISE software.