If the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer. The third controller type provides proportional with integral and derivative control, or PID.
Amplifier figures of merit. In electronics, the figures of merit of an amplifier are numerical measures that characterize its properties and performance. Figures of merit can be given as a list of specifications that include properties such as gain, bandwidth, noise and linearity, among others listed in this article. Figures of merit are important for determining the suitability of a particular amplifier for an intended use.
The Importance of Revenue Variances. The revenue variance for an accounting period is the difference between budgeted and actual revenue. A favorable revenue variance occurs when actual revenues exceed budgeted revenues, while the opposite is true for an unfavorable variance. Revenue variance results from the differences between budgeted and actual selling prices, volumes or a combination of the two.