Possible source of Data Errors

Data Source Possible Error Corrective Actions 

Operator input manual data entry Bad data Key entry error Interactive limit check with alarm 

External data system serial communication link Bad transmission Limit check with alarm Message validity check Limit check with default 

Application software Program error Rigorous testing Limit check with alarm 

The scenario component is capable to store pre-defined scenarios and to maintain them (with efficient algorithms in a minimum time) subject to any change in the process. Also, the scenario component is capable to cope with the real time process operations to reflect up-to-date status of the plant and to develop different scenarios for any desired path. ETA (Event Tree Analysis) (CCPS, 1993) is proposed to develop the different scenarios for D1 and D2 algorithms, while FTA (CCPS, 1993) is used to develop the scenarios for 01 and 02. The major difference between the FTA and the ETA is that FTA focuses only on the components faults starting from the top event (major component or process) then goes into sequence of possible faults till it reaches the 

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As a part of the plant safety framework, common data component is proposed to manage all common data for the plant safety framework and to accumulate the safety-related common data across plant activities. This component is a part of the data warehousing for the plant-wide activities across the plant lifecycle. The object-oriented modeling approach is used to abstract these common elements within the plantwide conceptual model while the physical data are within the data warehouse frame. The safety common data (SCD) component includes (but not limited to) the possible source of data errors, documentation standards (vocabulary), generic cause-consequence for each component type, checklists for operation-type jobs, and standard safety interlock levels. The common data are essential to be organized and formatted in a... 

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