One embodiment of a method of making an electronic device includes forming on a substrate surface a first layer having a peak-valley-peak profile, and forming a second layer on the first layer by use of a target positioned along a line-of-sight that excludes a floor of the valley such that the second layer is not formed on the floor of said peak-valley-peak profile. Each of the coresprocessing units treated in a symmetric fashion, and each core may choose its operating state independent of the other cores, without performing complex handshaking or signaling operations. The set of treatments is based, at least in part, on the particular failure. Various preferences correlated to the certificate are identified.