Everyone will certainly have different aspects that they will certainly think about to be the "essential" when they are picking a supplier for their published circuit boards. For some, having fast turn PCBs that can be delivered back to them in a matter of days is the crucial factor. http://charliemyxzd.blogkoo.com/quick-turn-pcbs-and-also-various-other-essential-factors-in-choosing-a-producer-15409658