final int[] UNITS_NUMBER = armyModel.getUNITS_NUMBER();
                        switch(selectedSkill.getNAME())
                        {
                        case "Specjalista":

                            final int SPECIALIST_VALUE = 300;
                            int specialistSkillsValueInArmy = SPECIALIST_VALUE * UNITS_NUMBER[ArmyModel.SPECIALIST];

                            if(specialistSkillsValueInArmy < armyModel.getValue())
                                UNITS_NUMBER[ArmyModel.SPECIALIST]++;
                            else
                                makeError("SPECIALISTS LIMIT");

                            break;

                        case "Zwiadowca":
                        case "Harcownik":

                            int allUnitsWithoutPointMenAndSkirmishersNumber =
                                    armyModel.getARMY().size() - UNITS_NUMBER[ArmyModel.POINT_MAN_AND_SKIRMISHER];

                            if(UNITS_NUMBER[ArmyModel.POINT_MAN_AND_SKIRMISHER] + 1 <= allUnitsWithoutPointMenAndSkirmishersNumber - 1)
                                UNITS_NUMBER[ArmyModel.POINT_MAN_AND_SKIRMISHER]++;
                            else
                                makeError("POINT MEN AND SKIRMISHERS LIMIT");

                            break;
                        }