Do you use hierarchy in schematic designs? In layouts? If you think I'm asking if you carry a big stick and issue decrees upon your peers, read this. Many engineers and designers shy away from hierarchy because it's more complicated, but it only takes a little bit of extra thought to get it right the first few times around. Once designs are using blocks, they become much easier to check and maintain. They also save a lot of design time, mostly the wasted time copying circuitry needlessly. ECOs are also much faster, because one change to the lower level design immediately updates all contexts of the top-level design. There's no need to change every single one of the repeated circuits.
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