Temperature shifts which are due to the experimental setup are taken into account in the present study in the evaluation of kinetic procedures. When the temperature shifts considered have a linear relationship with heating rate, it is found that the coefficients in such relationships will decide the changing trend of the calculated activation energy and frequency factor values. This can explain some published results. However, in the above case the evaluation of the kinetic mechanism is rendered extremely difficult. In such cases there is a high possibility that a kinetic analysis will result in the prediction of an incorrect reaction mechanism. While the problem can be solved by minimizing the coefficients mechanically, performing experiments in a very narrow heating rate range is strongly recommended.