No. 2: Design analysis -- This ties in with point No. 1, but it covers the analysis that is undertaken to demonstrate that the design will work across the target design environment range. This includes worst-case analysis, part stress, FMECA (failure mode effects and criticality analysis), and so forth. How many of the readers can perform a worse case analysis of a simple potential divider circuit (taking into account tolerances, drifts, ageing...)?