Specific: Poorly defined objectives lack specificity. In the extreme case they are not relative to anything and are deprived from purpose. A project manager must know the origin of specificity which is the solution that fits the problem
Mesurable: Running out of resources is a good example of not being able to define our goals in terms of quantity. The precision of measuring the objective reflects how well the planning was done by a project manager
Achievable: This is simply a complement of the previous step which is Mesurable.From one hand, actual quantity required to achieve a goal judges its possibility of achievement. From the other hand, we can not exceed our potential resources and dwell on dreams. That is a way of how we solve personality clashes.
Realistic: To solve poor communication, we need to set realistic goals, not out of reach to be seen as a capable person nor very insufficient to free ride and benefit from leisure over work. A project manager must be what he really is and take some responsibility. Not knowing is allowed. But not searching for knowledge is not. For our example knowledge is communication. To communicate effectively is to find an equilibrium between skillset and mindset.
Timely: Finally, a goal that is specific (relativity and purpose), mesurable (quantity), achievable ( pertinence) and realistic must be bounded by time in the end to resolve a problem (suits a problem:))