This article contains a brief introduction to the main principles which should be followed by the constructors of tests and assessments. It briefly introduces the key concepts of test validity, reliability and wash back, and provides information on docimological test history, researches done in the described field, which have shown a multitude of factors that appear purposely or unpurposely in evaluation, generating a low objectivity in estimating the results. The work reveals the docimological principles as those needed to be used in analyzing the results and that the algorithm used while doing this does not mean subjectivity and absence of precision. There is a possibility not to sanction a very good paper for few common faults generated by the tiredness, carelessness. The methods provide student's accuracy, attention and predict that repeated wrong answer at common questions brings to the examinee a score unsatisfying his/her expectations. These factors should encourage students in using their gained learning potential and fight against cheating.