GENERAL KNOWLEDGE

Detailed explanation-1: -Reliability means consistency with which an instrument yields similar results. It concerns the extent to which a measurement of a phenomenon provides stable and accurate results. Reliability is concerned with consistency and replicability or with repeatability over time.

Detailed explanation-2: -Repeatability (also known as the intraclass correlation coefficient) is a statistical measure of the consistency of repeated measurements. It is usually called r and is the proportion of the variation between measurements that is due to consistent differences between the individuals measured.

Detailed explanation-3: -Repeatability, the system design must produce the same high quality product consistently. Systems that do not have repeatability produce scattered results. Reliability is maintaining the level of quality over time. Consistency is making sure every system is as consistent as possible.

Detailed explanation-4: -Reliability refers to the consistency of a measure (whether the results can be reproduced under the same conditions). Validity refers to the accuracy of a measure (whether the results really do represent what they are supposed to measure).