A Review of the Event Analysis of Systemic Teamwork Methodology

HFIDTC/WP1.1.3/10
Version 2/ 31 October 2005
Example
The following example is taken from an analysis of a switching scenario drawn from the
civil energy distribution domain (Salmon et al 2004b). The propositional networks
presented in Figure 3-18 to Figure 3-22 present the knowledge objects (shaded in red)
identified from the corresponding CDM output for that phase. The CDM outputs are
presented in Table 29 to Table 32. The propositional network consists of a set of nodes
that represent sources of information, agents, and objects etc. that are linked through
specific causal paths. From this network, it is possible to identify required information
and possible options relevant to this incident. The concept behind using a propositional
network in this manner is that it represents the ‘ideal’ collection of knowledge for the
scenario. As the incident unfolds, so participants will have access to more of this
knowledge (either through communication with other agents or through recognising
changes in the incident status). Consequently, within this propositional network, Situation
Awareness can be represented as the change in weighting of links. Propositional
networks were developed for the overall scenario and also the incident phases identified
during the CDM analysis. The propositional networks indicate which of the knowledge
objects are active (i.e. agents are using them) during each incident phase. The light blue
nodes in the propositional networks represent unactivated knowledge objects (i.e.
knowledge is available but is not required nor is it being used). The red nodes represent
active (or currently being used) knowledge objects.
Table 29 - CDM Phase 1: First issue of instructions
Goal Specification
Cue identification
Establish what isolation the SAP at Barking is looking for. Depends on gear
Don’t Believe It (DBI) alarm is unusual – faulty contact (not open or closed)
questionable data from site checking rating of earth switches (may be not fully
rated for circuit current – so additional earths may be required.
Check that SAP is happy with instructions as not normal.
Expectancy
Conceptual Model
Uncertainty
Information
Situation
Awareness
Decision expected by DBI is not common.
Recognised instruction but not stated in WE1000 – as there are not too many front
and rear shutters metal clad switch gear.
Confirm from field about planned instruction – make sure that SAP is happy with
the instruction.
Reference to front and rear busbars.
WE1000 procedure
Metal clad switchgear
Barking SGT1A/1B substation screen
SAP at Barking
Situation
Assessment
Ask colleagues if needed to
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