I am describing certain self-organization technique, which has the concept of goals (duh). These goals must manifest themselves in certain quantities (e.g. 'go outside for 30 minutes', 'read 10 pages' etc), never as simply done/not done items (e.g. 'take out the trash' would not be an acceptable goal).
Can I say, "the goals must be measurable"? Does measurability imply there is a number, or yes/no questions can still be considered measurable? Is there a better single word describing this constraint? (I thought of countable, but it just doesn't sound right).