The use of tester inaccuracy adjustments such as an added load of 0.15 pF is array and vendor specific. Assume a Military-grade circuit. 15.47 LU from the Front-Annotation table. Example bipolar array multipliers are shown below. Refer to the appropriate design manual for worst-case multipliers for a particular array series.
Many vendors specify a typical propagation delay, with or without assumed loading.
Delays due to fan-out loads are also given for specific conditions. When the power supply or temperature varies from the typical specification, some derating must be applied to the typical delays. In addition, some allowances for process variations should be made. Some vendors specify the derating required for each of these items as a separate number or curve while others provide a combined worst-case multiplier, designed to assume that everything is in the worst possible state. There may different derating or worst-case multipliers for macros and for the interconnect nets, and there may be different multipliers for different macros.