The test- retest mechanism runs on the idea that a relliable data remains consistent over time. The inconsistency in the customer feedback regarding the product in the above example indicates that the product feedback website initially visited does not reflect a true picture of the customer opinions and thus, is not a reliable source for a potential customer to make decisions about their product purchases. The product is said to be faulty, sub-par and the customer service offered by the brand that launched it is claimed to be very poor. On the other hand, customer review blogs and other websites highlight major drawbacks that come with the product. The customers who have provided the feedback are seen mentioning the product as being highly effective and pocket friendly. The more reliable a data is, the better it will be able to direct the flow of intelligent decision making.įor example : A product feedback website projects the initial responses to a newly launched product in good light. Reliability is a qualitative metric that guides the direction of follow up. When the same results are obtained consistently for the experiment under consideration, it becomes an indication of the reliability. Reliability refers to the usefulness of data in fueling informed decisions.
