Unavailability assessment of redundant safety instrumented systems subject to process demand

S Alizadeh, S Sriramula - Reliability Engineering & System Safety, 2018 - Elsevier
The process industry has always been faced with the challenging task of determining the
overall unavailability of safeguarding systems such as the safety instrumented systems …

Reliability modelling of redundant safety systems without automatic diagnostics incorporating common cause failures and process demand

S Alizadeh, S Sriramula - ISA transactions, 2017 - Elsevier
Redundant safety systems are commonly used in the process industry to respond to
hazardous events. In redundant systems composed of identical units, Common Cause …

Reliability assessment of safety instrumented systems subject to different demand modes

Y Liu, M Rausand - Journal of Loss Prevention in the Process Industries, 2011 - Elsevier
Safety instrumented systems (SISs) are commonly used in the process industry, to respond
to hazardous events. In line with the important standard IEC 61508, SISs are generally …

Impact of common cause failure on reliability performance of redundant safety related systems subject to process demand

S Alizadeh, S Sriramula - Reliability Engineering & System Safety, 2018 - Elsevier
Abstract Common Cause Failures (CCFs) can compromise reliability performance of safety
related systems and hence configurations with identical redundant units receive special …

[HTML][HTML] Performance analysis of redundant safety-instrumented systems subject to degradation and external demands

A Zhang, A Barros, Y Liu - Journal of Loss Prevention in the Process …, 2019 - Elsevier
Safety-instrumented systems (SISs) play a vital role in preventing hazardous events in the
offshore facilities. Many of existing performance analysis of SISs are based on the constant …

Reliability Importance of the Channels in Safety Instrumented Systems

Y Liu, MA Lundteigen - Industrial Engineering, Management Science and …, 2015 - Springer
Safety instrumented systems (SISs) are used in many application areas to reduce the
likelihood of hazardous events and/or to mitigate the consequences of such events. A typical …

[HTML][HTML] Study of testing and maintenance strategies for redundant final elements in SIS with imperfect detection of degraded state

A Zhang, H Srivastav, A Barros, Y Liu - Reliability Engineering & System …, 2021 - Elsevier
Safety-instrumented systems (SISs) have been widely installed to lower risks of
equipment/process by performing the designed safety functions in cases of demands. Final …

Interaction effects of multiple input parameters on the integrity of safety instrumented systems with the k‐out‐of‐n redundancy arrangement under uncertainties

Y Xia, L Ding, ZC Tang - Quality and Reliability Engineering …, 2023 - Wiley Online Library
A safety instrumented system (SIS) is extensively used to prevent or reduce risk. The
Probability of Failure to perform its intended functions on Demand (PFD) of a practical SIS …

Evaluation of risk and cost using an age-dependent unavailability modelling of test and maintenance for standby components

D Kančev, M Čepin - Journal of Loss Prevention in the Process Industries, 2011 - Elsevier
The improvement of safety in the process industries is related to assessment and reduction
of risk in a cost-effective manner. This paper addresses the trade-off between risk and cost …

Unavailability model for demand-caused failures of safety components addressing degradation by demand-induced stress, maintenance effectiveness and test …

P Martorell, I Martón, AI Sánchez, S Martorell - Reliability Engineering & …, 2017 - Elsevier
The reliability, availability and maintainability (RAM) modelling of safety equipment has long
been a topic of major concern. Some RAM models have focused on explicitly addressing the …