The application of the Layer of Protection Analysis (LOPA) in Sour Water Refinery Process

Habibi, Ehsanollah; Zare, Saeed; Keshavarzi, Mehrzad; Mousavi, Maryam; Yousefi, Hossein Ali

doi:10.4103/2277-9183.122445

Cited by 4 publications

(3 citation statements)

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“…[ 11 ] A simple linear regression analysis showed a significant relationship between work schedules and general fatigue. [ 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ]…”

Section: Discussionmentioning

confidence: 99%

A survey of the relationship between work schedule and its effect on the fatigue of rescue personnel in Isfahan with a standard method of CIS202

Habibi

Soury

Rajabi-Vardanjani

et al. 2015

J Edu Health Promot

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“…[ 11 ] A simple linear regression analysis showed a significant relationship between work schedules and general fatigue. [ 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ]…”

Section: Discussionmentioning

confidence: 99%

A survey of the relationship between work schedule and its effect on the fatigue of rescue personnel in Isfahan with a standard method of CIS202

Habibi

Soury

Rajabi-Vardanjani

et al. 2015

J Edu Health Promot

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“…This study can also be a preface for more investigations for the development of an anthropometry database. [24252627282930313233]…”

Section: Discussionmentioning

confidence: 99%

Precise evaluation of anthropometric 2D software processing of hand in comparison with direct method

Habibi¹,

Soury²,

Zadeh³

2013

J Med Signals Sens

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Various studies carried out on different photo anthropometry, but each one had some deficiencies which during the years they have been resolved. The objective of this paper is to test the efficiency of two-dimensional image processing software in photo anthropometry of hand. In this applied research, 204 office workers and industrial workers were selected. Their hands were measured by manual with photo anthropometric methods. In this study, designing the “Hand Photo Anthropometry Set,” we tried to fix the angle and distance of the camera in all of the photos. Thus, some of the common mistakes in photo anthropometric method got controlled. The taken photos were analyzed by Digimizer software, version 4.1.1.0 and Digital Caliper (Model: Mitutoyo Corp., Tokyo, Japan) was used via manual method. t-test statistical test on data revealed that there is no significant difference between the manual and photo anthropometric results (P > 0.05) and the correlation coefficients for hand dimensions are similar in both methods illustrated in the range of 0.71-0.95. The statistical analyses showed that photo anthropometry can be replaced with manual methods. Furthermore, it can provide a great help to develop an anthropometric database for work gloves manufacturers. Since the hand anthropometry is a necessary input for tool design, this survey can be used to determine the percentiles of workers’ hands.

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“…HAZOP is also supported by software tools like PHAWorks or HAZOP+. LOPA is a tool to carry out an assessment of barriers and the protection using a simplified form of semi-quantitative assessment 6 . Furthermore, LOPA is used to determine the acceptable risk and the target factor 7 .…”

Section: Iec 61508mentioning

confidence: 99%

Quantitative risk evaluation based on IEC 61508 for SW functional safety of marine bigdata analysis system

Kim¹

2018

IJET

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Background/Objectives: SW functional safety is beyond the SW quality and IEC 61508 is needed instead of ISO/IEC 9126.Embedded SW for Sensor or actuation is needed to be tested as perspectives of functional safety.Methods/Statistical analysis: Risk analysis and quantitative risk evaluation procedure is used for estimating the risk of SW related to safety of equipment and embedded system. FMEDA (Failure Mode, Effects and Diagnostic Analysis) is one of the method for certifying SIL(Safety Integrity Level) but it is not easy to use when the sensors or actuations are too many. FMEA (Failure Mode and Effects Analysis) is simple method to use with another bigdata analysis technique. MBAS (Marine Bigdata Analysis System) is the SW to be analyzed the risk quantitatively in this study to assure the target safety.Findings: Test methods based on IEC 61508-3 are defined as SIL to assure SW quality effectively but SIL of FMEDA uses complex equations to be defined and sensing equipment parts could be classified as failure rates for input data for equations. I recommend simple method to decide test methods as Severity Level that is very similar to SIL but very easy based on FMEA in this study. MBAS is bigdata solution and sensing data can be validated and verified by the analyzed results of the relation of process functions as dependent value from sensor data as independent value.Improvements/Applications: No needed to be classified and be calculated the detected or undetected failure rate of sensor to assign the parts of equipment to define risks.

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The application of the Layer of Protection Analysis (LOPA) in Sour Water Refinery Process

Cited by 4 publications

References 0 publications

A survey of the relationship between work schedule and its effect on the fatigue of rescue personnel in Isfahan with a standard method of CIS202

A survey of the relationship between work schedule and its effect on the fatigue of rescue personnel in Isfahan with a standard method of CIS202

Precise evaluation of anthropometric 2D software processing of hand in comparison with direct method

Quantitative risk evaluation based on IEC 61508 for SW functional safety of marine bigdata analysis system

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