As I feel about working hard as a description which do not have a domain but to help you as to to do hard work guides you towards a domain from which you can understand the results you have achieved, this also helps you to understand whether your time and effort is fruitful if not then you can refurbish your way to succeed. SMART essentially stand for --- Specific,Measurable,Achievable, Reachable, Time bound.Hope this clears the doubt.
Best Wishes.
