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Here is what I would do in a bit of detail using a CMM.
There must be 3 holes marked "A" on the drawing although I only saw one.
Pick 1 hole and use it for an origin. Obtain its center.
Go to the second hole and measure its size. Many CMMs will perform this function automatically but if your CMM doesn't, measure it since you will have to calculate the tolerance. From the actual hole size, subtract its virtual condition size which will be - - - (MMC size (4.70) - the tolerance in the feature control frame (0.1) = 4.69. From the actual size subtract 4.69 and you will have a diametrical tolerance zone of more than 0.1 mm. That is the actual tolerance depending upon its size. If one calculated a diametrical tolerance zone of 0.11, as an example, it has a radial tolerance of 0.055 mm.
From the first hole or origin go to the theoretical center using the basic dimensions shown. The actual center should be within the calculated radial tolerance.
Go the the third hole and perform the same operation as the second. One must calculated its actual tolerance.
Now you have confirmed whether or not the 3 holes are within their tolerances except it is better using a checking fixture since we can confirm the position simultaneously.
Please note - I don't know who ever considered this a SC but it certainly is not applicable in this situation.
GD&T is tough at times but I have been training in it for over 20 years.
There must be 3 holes marked "A" on the drawing although I only saw one.
Pick 1 hole and use it for an origin. Obtain its center.
Go to the second hole and measure its size. Many CMMs will perform this function automatically but if your CMM doesn't, measure it since you will have to calculate the tolerance. From the actual hole size, subtract its virtual condition size which will be - - - (MMC size (4.70) - the tolerance in the feature control frame (0.1) = 4.69. From the actual size subtract 4.69 and you will have a diametrical tolerance zone of more than 0.1 mm. That is the actual tolerance depending upon its size. If one calculated a diametrical tolerance zone of 0.11, as an example, it has a radial tolerance of 0.055 mm.
From the first hole or origin go to the theoretical center using the basic dimensions shown. The actual center should be within the calculated radial tolerance.
Go the the third hole and perform the same operation as the second. One must calculated its actual tolerance.
Now you have confirmed whether or not the 3 holes are within their tolerances except it is better using a checking fixture since we can confirm the position simultaneously.
Please note - I don't know who ever considered this a SC but it certainly is not applicable in this situation.
GD&T is tough at times but I have been training in it for over 20 years.