FIGURE J-1. Hypothetical parameter space for control of a particular class of items. In this example, the highest performance item of this class that is made has p1 = P1max and p2 = P2max. Items with P1c > p1 > P1max and P2c < p2 < P2max are controlled. Items with p1 < P1c and p2 < P2c are not controlled.

stance, Harmonized System category 8471.91—processing units for computers), items should be sorted into item-groups.

In the current list, classes of items are controlled by specifying a set of performance parameters, such as bandwidth and operating frequency. Typically, items that have performance parameters above those thresholds are controlled, and all those lying below those thresholds are decontrolled. Suppose, for example, that for a particular class of items, I, two parameters are specified as important in making control decisions, p1 and p2. Items are controlled if p1 > P1C or if p2 > P2C. Suppose that the highest performance version of I has p1 = P1max and p2 = P2max. The situation is shown graphically in Figure J-1. The shaded portion of this figure represents the subset of items of type I that are subject to export control.

The objective in defining item-groups is to cluster items that lie in the shaded region into a finite number of groups. For example, if the controlled range of both p1 and p2 was divided into two equal intervals, the result would be the creation of the eight item-groups labeled I1 through I8 in Figure J-2.

To make the rank ordering and weighting process feasible, enough item-groups must be defined to allow distinctions to be made, but without over-

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