To allow means to permit or give permission.
“My friend Janie’s mom allows her to stay out past 10:00 p.m.”
Another meaning for the verb “to allow” is to allocate a certain amount.
Leaving a half inch of air space in the drum allows for expansion of the liquid on hot days.
To enable means to provide the means or power, or to make something possible or easy.
The new WhizBang feature of the software enables users to cut simulation time in half.
Here’s a Bad Example:
Quantitative evaluation allows operators to produce their assets at maximum rates.
In this case, the operators are not being given permission or being allocated a certain amount; instead, they are given the means to produce to the max, therefore the word “allows” should be “enables.”
Here’s a good way to remember the difference between “allow” and “enable”:
People allow things; things enable people.