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Fig. 4. Link between main influential factors on Control Mode
Fig. 5. Planning depending the control mode
We use the control mode ( C m ) as follows and as describes in Fig. 5. In strate-
gic, tactical and opportunistic mode agent will prepare the intervention (tools).
Depending on the mode, operators are doing the good procedures or operate
deviations or even errors or violations. They do not interpret the context in the
same way and do not have the same representations.
We integrate safety implications directly in the description of a task. Safety
tasks (BTCU tasks) may be characterized as ”'allowed to be performed”', ”'al-
lowed not to be performed”', or ”'not allowed”'. According to their C m agents
will do or not the BTCU tasks (Fig. 6).
To determine the errors that can be done according to CREAM, we consider
CREAM model as a request base. In this article we only consider the simple
phenotype proposed by Hollnagel (Fig. 7). We determined which characteristics,
parameters can bring the agent to do such errors and associated it with rules.
We also linked errors with the C m .
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