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94 PCB007 MAGAZINE I APRIL 2021 Last spring, I wrote a column focusing on cosmetic issues and I asked, "Why does the electronics industry reject good products when it's not always needed?" In my next col- umn, I turned the coin around and asked if we have understood the workmanship rule cor- rectly: "Printed boards shall be free of non- conformances in excess of those allowed in this specification." I ended the column by asking, "So, what can we learn from this?" e most important thing is to know the standard and how to use it. Most people read the measurable requirements, while a require- ment like the workmanship rule is le out. Leaving out the workmanship can make it hard to agree, because it requires at least two parties to find a solution that works for both. is, however, leads us here, where we shall discuss AABUS, what it means, how to han- dle it, and basically a list of issues that need AABUS. Why Do We Even Need an Agreement? First, AABUS means "As Agreed Between User and Supplier." As already mentioned, an agreement needs two parties, and those two need to find a common solution. e problem with such cases is why we need that agreement. It can obviously be something that can be seen from two sides and end up with a very differ- ent understanding if you don't talk together. However, in the IPC standard it could even be a measurable parameter, but the standard has le the solution to be agreed upon. Don't Forget AABUS The PCB Norsemen by Jan Pedersen, ELMATICA

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