Each job has an exponentially distributed service time.

Service times are exponentially distributed (with rate parameter μ).

The length of a domain is distributed exponentially, since there is a constant probability at any step of encountering a flip.

Suppose a given variable is exponentially distributed and the rate parameter λ is to be estimated.

Similar caveats apply to the following examples which yield approximately exponentially distributed variables:

See the M/M/c queue article for the case where service times are exponentially distributed.

The length of the time steps is distributed exponentially.

The spacings between the points should be asymptotically exponentially distributed.

The square of this distance should be exponentially distributed with a certain mean.

The smallest sphere's volume should be exponentially distributed with a certain mean.