Why wasn't the woman who failed to pay attention...
...to detail fired?
I had a job a few years back with a Seattle technology company. I had been very depressed, and it was affecting my work. When my boss called me in, he DID NOT criticize me. Instead, he asked me how I was feeling. I told him the truth, acknowledging that my work had not been up to snuff. He courteously asked "Do you know how to handle it?", and I said yes. I made an effort to get back on track, and that seemed to be satisfactory.