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94 SMT Magazine • November 2015 component is automatically classified as "SO", which requires an X body tolerance for the specific machine we are preparing the library for. The rule for calculating the X body toler- ance for this particular machine is shown in Figure 14, with a plain English version written underneath. An example of a more complicated rule is shown in Figure 15 for the same component. In this example, the rule relates to the nozzle figure 13: Matrix linking machine-library component classes to machine-library content rules. figure 14: automatic derivation of machine-specific library content (X-body tolerance). STreAmLINING PCb ASSembLy AND TeST NPI WITH SHAreD ComPoNeNT LIbrArIeS arTIcLe