Foreword

There is no facility in the world which is free from hazards and risks. There have been a number of catastrophes in the world (e.g., Bhupal in India). After these, people realized that there should have been a systematic approach toward safety. Each facility is different from others; naturally hazard analyses will be varying in nature. Since in the modern era of high competition, people depend a lot on electronic instrumentation and control. Keeping these in mind, IEC came out with IEC 61508 and 61511with systematic approaches toward safety instrumented systems (SISs) and safety integrity level (SIL).
Hazard analysis and SIS is a vast subject to cover all sectors of industrial facilities. It is indeed a good idea that the author has felt ...

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