ES35: Evaluating Control System Safety & Reliability



Training can be conducted at your plant site or as open enrollment. ISA Onsite Training brings ISA courses to your site. The expert instruction and training materials will come directly to you. All you have to do is pick the time and place - ISA does the rest!


Provides a tool chest of useful methods to evaluate the safety and reliability of control systems from relays through microprocessor-based systems, including sensors and actuators.

You Will Be Able To:

* Apply the rules of probability to quickly approximate safety and reliability

* Develop and apply a safety/reliability evaluation checklist

* Conduct a failure modes and effects analysis (FMEA)

* Apply fault trees, reliability block diagrams or Markov models to the evaluation of 

   loop safety and reliability

* Evaluate the diagnostic coverage factor for a control system

* Understand the rules of common-cause strength

* Evaluate and compare the safety and reliability of various system architectures

* Estimate the parameters needed for safety and reliability evaluation

* Evaluate the safety integrity level of safety loop designs as part of an ANSI/ISA-84.01-1996 safety life cycle


You Will Cover:

* Safety and Reliability Evaluation: Purpose and Limitations | Qualitative vs.

   Quantitative | Benefits

* Rules of Probability: Summation | Addition

* Stress-Strength: Industrial Stressors | Strength Factors/Checklist

* Safety/Reliability Terms: MTTF, MTTR, MTBF | Reliability, Availability | Failure

   Rate - Bathtub Curve | Failure Modes - Safety, PFDavg

* Failure Modes and Effects Analysis: Objectives/Description | Coverage Factor


* Fault Tree Analysis: Objectives/Description | AND, OR Gates

* Reliability Block Diagram Analysis: Series Networks | Parallel Networks

* Markov Models: Failure States | Model Building | Model Solving

* Software Safety and Reliability: Complexity | Testability | Vendor Questions

* Fault Tolerance Systems: Redundant Architectures | Common Cause Strength |

   Diagnostics | Architecture Evaluation

* Safety/Reliability Checklist

* Safety Instrumented Functions: SIL Verification | Evaluation Methods


Classroom/Laboratory Exercises:

* Calculate probabilities of failure

* Evaluate the potential reliability of a control system based on design features

* Study a redundant system and develop a Markov model

* Given failure rate data, solve the Markov model for probability of failure on

   demand (PFD), a measure of safety and mean time to failure (MTTF), and measure

   of system success

* Given failure rate data, evaluate the SIL of a safety instrumented function using a

   combination of techniques


Course Length:

Length: 2.0 3.0 Days


Please the form and contact PT Sigma Kreasi Instrument (SKIns)

Includes ISA Text: Control System Safety Evaluation & Reliability, 2nd Edition.