PARTS COUNT METHOD
This prediction method is applicable at preliminary stages, during bid proposal and early design phases; when insufficient information is available regarding the parts' stress. The parts count method provides an estimate of reliability based on a count by part type (Resistors, capacitors, integrated circuits, transistors etc.).
The advantage of this method is that it allows rapid estimate of reliability in order to quickly determine the feasibility of a given design approach. This method does not require detailed part-by-part stress & design data.