Page 8 - HFACS Flipbook Holcim v 1.2

UNSAFE ACTS

ERRORS

Decision Errors
Decision Errors often occur during the performance of diagnostic
or problem-solving tasks that require conscious effort. These
"thinking" errors typically result from a lack of information,
knowledge or experience.
● Inadequate information gathering - limited search,
disregarding/ignoring relevant cues
● Inadequate situation assessment - failure to recognize
patterns/relationships among cues, focusing on irrelevant
information
● Inadequate action/response selected - inaccurate/risky
action chosen, failure to prioritize actions

Skill-Based Errors
Skill-based Errors often occur during the performance of highly
practiced activities that do not require much con centration.
These "doing" errors frequently appear as attention failures,
memory failures or errors associated with the technique with
which one performs a task.
● Incorrect action inadvertent - mis ordering, mistiming of
response
● Omitted action - missing - steps in a procedure, place
losing, forgetting intentions
● Improper technique - inappropriate performance method
for the situation (speed/timing/positioning)

2022 Holcim Group HSE