variables are designed and tailored this is accomplished by determining the resolutions and quantizer relationship required to represent the output signals of the individual sensors measuring the key variables over the ranges determined at step 230 in a preferred mode for selecting the quantizer relationship the quantization error introduced into the acceleration factor estimator by any quantizer is approximately constant over the range of the measured variable the resolution of the individual quantizers may be chosen so that the number of possible individual addresses calculated by address calculator 140 of fig1 is as close as possible to the size of memory 150 without exceeding it fig3 is a flowchart 300 recounting the ordered functions of the acceleration factor estimator using tailored quantizers step 310 is the initialization step where all memory locations are set to zero at step 320 a decision is made in accordance with whether or not a sampling command is present from clock 160 at step 330 all of the sensors are sampled and at step 340 all of the samples from the sensors are quantized each quantization being made according to the quantizer designed and tailored for its associated sensor over the monitoring range of that.