The analysis of the deviations from standard costs may be a source of valuable information for the company management. Introducing the deviations from standard costs in the performance reports would provide better accuracy for the process of performance assessment. By analyzing the deviations and establishing the responsibilities, the manager could take corrective measures that would lead to achieving the target performance. Due to this analysis, the target performance levels mat be revised and reassessed. This article aims at proposing solutions for monitoring and interpreting the deviations