Category: Theory and definitions
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Safety Instrumented Systems
Safety in a plant is provided by layers of protection. The diagram from Emerson SIS Course shows the Safety Instrumented System (SIS) as the “safety layer” providing the final preventive layer before the mitigation layers must engage. Typically, safety instrumented systems (commonly known as Emergency Shutdown (ESD), Emergency Venting (ESV) or Safety Interlock Systems) consist of the three elements…
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Expected failure time for an item whose maintenance policy is time-based
Let Tc be the time of a cycle, tp the preventive maintenance time interval, and T the failure time. The expected life cycle Tc will be the planned maintenance time tp multiplied by the probability that planned maintenance does occur, plus the expected failure time (knowing that failure occurs before tp) multiplied by the probability that failure…
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EXAKT’s Three Modules
EXAKT is a set of software modules for accomplishing physical asset reliability from maintenance related data that is commonly available in an industrial organization. There are three EXAKT modules. They are listed in the following paragraphs: EXAKT for Modeling. This is a Reliability Analysis tool that extends Weibull analysis to include Condition Monitoring and Process data.…
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A survey of signal processing and decision technologies for CBM
Introduction Condition-based Maintenance recommends actions based on information acquired through observation and analysis. We note, moreover, that the CBM process, itself contains three sub-processes or steps: data acquisiton, signal processing, and maintenance decision making.
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Difference between LRCM and EXAKT
What is the difference in LRCM & EXAKT EXAKT is a software application for performing Reliability Analysis (RA). RA is a general set of software enabled procedures used by Reliability/Maintenance Engineers to develop and deploy rules (called models). These models optimize, monitor, and systematize day-to-day decision making in maintenance. RA, in order to generate realistic…