What could this mean?

I had an interview for a job (and I thought I did well). The interviewer said that they had some other people to interview through-out the week (this was last week) but will contact me by Friday (friday last week) to let me know if I get a second interview. She told me at the time that they had to go through all the interviews and make a decision. But I haven't heard anything yet. What could this mean?