Reason for being anomalous

[carrtesy]

Hello,
first of all, Thanks for your great work.

May I ask the criterion, or examplary for anomaly being anomaly?
In the paper, the data was created using ISA reports, but we aren't so aware of the detailed reason behind.
Could you give us more explanation?
Not need for all, but simple example would be very helpful for the understanding of your dataset. (For example, In this interval labeled anomalous, machine had stopped execution.)

Thanks,
Carrtesy