A method for presentation of functional coverage includes representing a set of attributes of a design under test as a multi-dimensional cross-product space, which includes events corresponding to combinations of values of the attributes to be tested, the events including legal and illegal events. The projected total power consumption for the computing device to satisfy a power consumption policy for the device is determined. The voltage conveyor module is controllably coupled to the output, and the voltage signal generator is controllably uncoupled from the output of the electronic device. Also, file type limitations related to email attachments are overcome, provides improved attachment security, and reduces email bandwidth costs.