It's A Man Machine Interface Issue
More and more our accident causal chains are containing man and machine interface issues.
We have less and less all machine or all crew issues as the primary cause (in spite of some folks that use probable cause in reports)
Yes the overall accident rate is decreasing since the paper I presented in 1992 but we still have a lot to learn about to how to live with the systems that we create.
As always we need to not only identify the causal factors but decide as an industry where and how to address those that are most common today
Do we improve the machine or the man since neither will achieve perfection?