On Monday, the maintenance manager sent an e-mail memo to the production manager saying that...

On Monday, the maintenance manager sent an e-mail memo to the production manager saying that the date and time of the next planned outage would be on the third shift of the coming Friday. When the maintenance manager arrived at the unit on Friday third shift, the equipment was still operating at full capacity. The operator said he knew nothing of a planned outage and he had to make up production on this shift. Which of the following is the most likely reason the equipment was still running?