The phrase "by operator" is correct and usable in written English.
It can be used to indicate that an action or process is performed by a specific operator or individual.
Example: "The system was updated by operator 12 during the maintenance window."
Alternatives: "by the technician" or "by the user".
These results indicated winter maintenance operations are impacted by operator fatigue.
This study clearly shows that lessons have not been learnt from thermal runaway incidents caused by operator errors, management failures and lack of organised operating procedures.
Some mistakes were caused by operator error.
At the time, the chief executive, Ben Verwaayen, cited "market uncertainties" and "selective spending" by operator clients at year's end.
Oil spills from those sites, caused by operator errors and vandalism, have thoroughly damaged lands, the UN found.
iPhone / iPad Spanish social network Tuenti is majority-owned by operator group Telefonica, and is hoping to find an audience globally with its messaging app.
The find, in the Hoop-Maud Basin in relatively shallow parts of the Barents sea, was said by operator OMV to involve up to 164m barrels of oil and up to 40bn cubic feet of gas.
Gartner commented that "the price difference between the iPhone 5c and 5s is not enough in mature markets, where prices are skewed by operator subsidies, to drive users away from the top of the line model.
The equipment failure was exacerbated by reactor operator error, as the emergency core cooling system was deactivated by operator action because of a misinterpretation of the type of accident that was occurring.
But he said that he planned to publish a comparative list of SIM card security by operator in December at a computer hackers' conference in Hamburg, Germany, called the Chaos Communication Congress.
