ICC color management technology can be adopted in a number of workflows. Unfortunately, not all color-management systems, as implemented, achieve equal success in real world. There are a number of factors that limit color management performance. This paper reviews factors such as end user's expectations and color management limitations. However, the objective of this paper is to discuss device limitations and how to use statistics and process control methodology to assess and reduce these variations. Test targets, color measurement, and press sheet sampling are utilized to assess spatial uniformity as well as temporal consistency of hard copy output devices. By comparing temporal variation of the process against specifications, process capability indices, CP and CpK, are used to analyze run-to-run color repeatability. To enhance color management performance, a demerit system, based on amplitude responses, was used to determine the best press sheet for printer profiling application. Color management performance ultimately depends on our ability to minimize and control spatial, temporal, and run-to-run variations.