Concepts Tasks Settings Glossary of CPR Terms Term Definition Action Plan An action plan in a current practice review recommends an action to prevent a failure or mitigate its consequences. The action types are condition-based maintenance, failure-finding maintenance, scheduled restoration or discard, and modification or redesign. Asset Reliability Program An asset reliability program is a set of pre-planned work (standard tasks and standard jobs) for an asset. You can also include triggering rules that define when this work is to be done. Standard tasks and standard jobs that are not triggered may also be included in an asset reliability program. Condition-based Maintenance A task that entails checking for potential failures so that action can be taken to prevent the functional failure or to avoid consequences of the functional failure. Failure-finding Interval A failure-finding interval is the length of time that it is considered safe to wait before performing failure-finding maintenance. The interval is calculated or estimated based on the desired availability and the frequency of failure of the protective device or system. Failure-finding Task A scheduled task used to determine whether a specific hidden failure has occurred. Failure Mode A failure mode is a single event that causes a functional failure. For example, if a pump’s impeller becomes worn, the pump cannot convey liquid at the required rate. Failure modes are analyzed in maintenance task analysis (MTA2), reliability-centered maintenance (RCM2), and failure modes, effects, and criticality (FMECA) analysis along with the action plans that prevent or mitigate failures. Safety instrumented function (SIF) analyses examine the risk of failure in safety devices, the effects and consequences of failure, and ways to reduce risk by putting safety provisions in place. For risk-based inspection (RBI) analyses, the failure of concern is loss of containment of pressurized equipment items. Examples of failure modes are small hole, crack, and rupture. Failure modes are not analyzed in current practice reviews. Maintenance Task Analysis (MTA2) Maintenance task analysis (MTA2) is APM’s unique strategy development methodology that enables the analysis team to quickly create and implement basic, technically-sound reliability programs. MTA2 is most effective when operational and maintenance knowledge about assets is well-documented and consistently used by employees. MTA2 provides an alternative to the resource-intensive RCM2 analysis, while still allowing you to identify the right work to improve performance across the plant. MTA2 methodology and tools allow the analysis team to: • Identify the assets to be analyzed • Identify the causes of asset failure • Recommend actions to prevent or mitigate failures On-Condition Task A task that entails checking for potential failures so that action can be taken to prevent the functional failure or to avoid consequences of the functional failure. Operating Context The operating context is the circumstances in which a physical asset or system is expected to operate. P-F Interval The PF interval is the time between the point at which a potential failure becomes detectable and the point at which it degrades into a functional failure. Risk-based Inspection (RBI) Risk-based inspection is a risk assessment and management process that focuses on loss of containment of pressurized equipment in processing facilities due to material deterioration. Risk analysis is essential to the RBI process and involves the systematic use of information to identify sources and to estimate the risk. Information can include historical data, theoretical analysis, and informed opinions. Analysis therefore requires a team of people from a range of technical disciplines. RCM2 RCM2 is the reliability-centered maintenance process practiced by Bentley APM consultants. One of the features of RCM2 that distinguishes it from other interpretations of the RCM philosophy is that cross-functional groups of users and maintainers perform the analyses. After training, these analysis teams apply the process to their assets to produce robust and cost-effective asset reliability programs. Scheduled Discard A scheduled task that entails discarding an item at or before a specified age limit, regardless of its condition at the time. Scheduled Restoration A scheduled task that restores the capability of an item at or before a specified interval (age limit), regardless of its condition at the time, to a level that provides a tolerable probability of survival to the end of another specified interval. Strategy Development Analysis Strategy development analyses are methodologies for evaluating asset priority, defining asset functions, determining how failures occur (failure modes), evaluating the risk of asset failure, and preventing or mitigating the effect of failures. The varieties of strategy development analysis include: • Asset Prioritization Analysis • Current Practice Review (CPR) • Design FMECA • Reliability Strategy Selection (RSS) • Maintenance Task Analysis (MTA2) • Reliability Centered Maintenance (RCM2) • Risk-based Inspection (RBI) • Safety Instrumented Function (SIF) Analysis • Hazard and Operability (HAZOP) Analysis
