Ideally, project objectives should be SMART, or be capable of being made SMART once further definition work has been done.
SMART = Specific, Measureable, Achievable, Relevant, Time-bound.
Increasingly, it’s important to recognise the financial do-ability of projects when setting objectives. So, a re-definition of SMART that is gaining increased acceptance is:
Specific, Measureable, Achievable, Resourced, Time-bound.
“Resourced” requires you to be confident that there will be an appropriate budget (people and money) for the project.