'operating rate' is correct and can be used in written English.
You can use it to refer to the speed at which a machine operates or works. For example, "The factory was forced to reduce its operating rate by 15% in order to reduce costs."
According to the electricity specification indicated on the casing of mobile phone battery, for example Sony Ericsson Xperia Ray, battery capacity has marked 1,460 mAh with operating rate voltage 3.7 V; in other words, it can theoretically deliver the power operational rate about 5.402 Wh, as listed in Table 2, when it works continuously and exhaustively.
The operating rate measures not only output but also changes in productivity levels.
The operating rate at mines was down eight-tenths of a percentage point, to 84.7percentt.
For manufacturers, the operating rate dropped to 79.3percentt, from 79.9percentt in February.
The operating rate at factories making durable goods - items expected to last three or more years -rose to 78.4percentt, up two-tenths of a percentage point, while the operating rate for non-durable goods remained unchanged at 84percentt.
Analysts generally consider an operating rate of 85percentt or above as an indication of inflationary pressures.
The company said sharply lower sales volumes and the resulting lower plant operating rates forced it to lower its forecast.
"Operating rates for auto and truck assembly facilities dropped to levels near their 1982 recession lows," the department said.
The November increase in operating rates was the first since a gain of two-tenths of a percentage point left industry operating at 79.2percentt of capacity in July.
Analysts say operating rates at steel plants have dropped drastically in the last few years and are expected to fall even more, possibly to their lowest point since 1986.
Analysts predicted that operating rates in the auto industry would decline in the next few months because cut-rate financing incentives have been removed.
