People often want to know how qualitative and quantitative risk assessments differ from each other. This is a good question in today’s world of digitalization where there are many different RBI (Risk-Based Inspection) software packages available. Based on its configuration, IMS PEI allows users to swap between methodologies for each RBI Analysis. The default is a semi-quantitative methodology, since this is preferred by most. People sometimes confuse the different types of recommended practices. For example, API 580 outlines requirements (e.g. conceptual approaches and necessary elements to be included in an RBI assessment), whereas API 581 outlines a methodology aligned with API 580 software. RBI software packages can thus be aligned with a best practice that outlines requirements (e.g. API 580), without implementing an associated methodology (e.g. API 581).