When conducting the survey it is not necessary to quest every individual from the target segment. It is quite sufficient to know the opinions of just a part of it however, wrong selection might make the collected information considerable different from reality. This is why the services of professional sampling specialist need to be applied.  

Data collection and statistics department of ACT is composed of experienced sampling specialists that provide sampling for each certain study. In a first place, optimal sample size is to be determined with highest reliability and lowest improbability as well as sampling design is to be adjusted to the objectives of study. While creating the sampling design in most of the projects probability sampling method is being applied to reach the maximum representativeness. However, there are specific projects where it is better to apply non-probability sampling methods like quote or snow-flake principle methods. Preparing the design and calculating the size of samples ACT specialists apply globally acknowledged formulas and calculation methods. ACT stores the significant database which allows making preliminary statistical evaluations and implementing sampling of certain individuals to be surveyed.