1. A method of assessing the reception of data from selected ones of channels in a bus comprising a plurality of channels, the method comprising: performing a first simulation, using one or more processors, to determine a combined probability distribution function over a unit time interval, the combined probability distribution function being indicative of cross-talk and simultaneous switching output noise between the selected ones of channels of the plurality of channels in the bus, the combined probability distribution function being indicative of a reception of at least one logic state by a receiver coupled to the selected ones of channels, the at least one logic state being transmitted over each of the selected ones of channels by a transmitter in a communications circuit.