An executive MBA is for...executives, or at least people who wish to fit their MBA around their work-life. The learning schedule is therefore designed to fit in with a busy professional's job. Often employers will allow (and finance!) those executives with management potential to study and work at the same time. This of course offers benefits the employer as well, as they are gaining an upskilled professional who can add additional value to their business.
To assess if you are suited to an executive MBA, conduct this Executive MBA Self Assessment test.