Placement Accuracy and CPK

We are doing a field study to test the placement accuracy and calculate cpk of some machines in our plant. From previous readings, it is suggested that you buy glass board kits from Accuspec, Topline, etc. Is that the easiest/cheapest way to go about it or is there a way you can create your own board, components, and kit so this can be done frequently? What's the easiest yet most efficient way to measure/determine the machines accuracy?

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