On: Quality != Quality

[caminante]

I think you're conflating terms. Exceeding minimum specification != exceeding minimum expectation.

Adding extra things is necessarily exceeding specifications.

[Retric → caminante]

Being say lighter or heavier is not inherently an improvement. So, change in mass can only exceed specifications if is is an improvement.

[caminante → Retric]

No, "improvement" is still subjective.

If the spec calls for a car, and I give you a car with a roof-rack, then I've exceeded the specification for what the car must do. Whether that's an improvement is subjective. If you don't need the rack, then your MPG suffers.