**Q: **Is a measurement the assignment of a number to a characteristic of an object or event? ¶

**A: **Yes, and which can be compared with other objects or events.

**Q: **Is a measurement pursued in the field of metrology? ¶

**A: **Yes.

**Q: **Are measurements achieved by simply moving the decimal place: 1.234 metres is 1234 millimetres or 0.001234 kilometres? ¶

**A: **Yes.

**Q: **Is a measurement originally developed to prevent fraud in commerce? ¶

**A: **Yes.

**Q: **Is a measurement a cornerstone of trade? ¶

**A: **Yes, and science, technology, and quantitative research in many disciplines.

**Q: **Is a measurement derived from historical agreements? ¶

**A: **Yes.

**Q: **Are measurements uncertain? ¶

**A: **Yes, so instead of assigning one value, a range of values is assigned to a measurement.

**Q: **Is a measurement dependent on the context and discipline? ¶

**A: **Yes.

**Q: **Is a measurement defined as "the correlation of numbers with entities that are not numbers"? ¶

**A: **Yes, The most technically elaborated form of representational theory is also known as additive conjoint measurement.

**Q: **Is a measurement : "A set of observations that reduce uncertainty where the result is expressed as a quantity"? ¶

**A: **Yes.

**Q: **Is a measurement performed? ¶

**A: **Yes, and the wavefunction of the quantum system "collapses" to a single, definite value.

**Q: **Is a measurement generally defined on a scientific basis? ¶

**A: **Yes, and overseen by governmental or independent agencies, and established in international treaties, pre-eminent of which is the General Conference on Weights and Measures , established in 1875 by the Metre Convention, overseeing the International System of Units and having custody of the International Prototype Kilogram.

**Q: **Is a measurement a taxonomy for the methodological character of a comparison? ¶

**A: **Yes.

**Q: **Is a measurement made? ¶

**A: **Yes, and a quantum system is simultaneously described by all values in a spectrum, or range, of possible values, where the probability of measuring each value is determined by the wavefunction of the system.

**Q: **Is a measurement not exact? ¶

**A: **Yes, but only precise to two significant digits.

**Q: **Is a measurement an action that determines a particular property of a quantum system? ¶

**A: **Yes.

**Q: **Is a measurement often misunderstood as merely the assignment of a value? ¶

**A: **Yes, but it is possible to assign a value in a way that is not a measurement in terms of the requirements of additive conjoint measurement.

**Q: **Is a measurement essential in many fields? ¶

**A: **Yes, and since all measurements are necessarily approximations, a great deal of effort must be taken to make measurements as accurate as possible.

**Q: **Is a measurement the determination or estimation of ratios of quantities? ¶

**A: **Yes.

**Q: **Is a measurement mutually defined: quantitative attributes are those possible to measure? ¶

**A: **Yes, and at least in principle.