This analytical study focused on the range perfor- mance impact of FPA charge handling capacity (CHC) and residual nonuniformity after compensation (NUC). It was found that the CHC and (especially) NUC characteristics of an IR sensor are at least as important as--and often more important than--traditional parameters such as quantum efficiency, spectral band, F/number and/or fill factor. These results have significant implications for IR sensor system design tradeoffs incuding those allocating FPA "real estate" between active area, charge storage wells and readout circuits--a trade made more complicated because readout circuit linearity is, a factor in estab- lishing FPA uniformity. The merits of hybridization to achieve high fill factor must be questioned unless non- uniformity is adequately addressed as well. It is clear that the entire sensor system--including CHC, NUC and the Nonuniformity Compensation subsystem--must be considered in selecting the "best" sensor configuration.