Data reduction using rank-of-ranks methodology

摘要

Data reduction for testing results obtained from the diagnostic testing of signal integrity at node points along a PC board using a Rank-of-Ranks data analysis methodology. The Rank-of-Ranks methodology including a reduction of node points along the PC board by the application of a node point reduction algorithm. Calculating a ratio of the Standard Deviation by the Mean for each node point and for each testing parameter to arrive at a Coefficient of Variation. Each node point is sorted and ranked based on the Coefficient of Variation for each tested parameter at a time. At each node point, Rank values of all the parameters are summed and then sorted on the basis of the Rank values. The node points are Re-ranked based on the sorted Rank values. The Re-ranked node points are entered into an ordered list or matrix where critical node points are chosen from the top of the Re-ranked node points for study, re-design and/or further testing of the PC board.