Reliability and validity are two of the most important assessment foundations that separate an excellent brand to an average and even poor to counterfeit product items.
In subjective definition, reliability testing is a valuation tool that oversees the stability, consistency, and proficiency results. On the other hand, validity refers to the key objective or the core outline for the reliability test. Both of these processes focus on identifying the quality factors present in a specific line of products and the available improvements to further develop them.
Reliance Testing Archetypes
Depending on the kind of product, there are various ways in which an evaluator establishes results. Reliability measure includes the following archetypes:
- Test and Retest – this type of reliability procedure involves repeating tests several times over a period of time. The results from each testing phase are then evaluated to determine the average stability of a product.
- Parallel / Comparative Measure – a wide-spectrum reliability measure which administers a variety of evaluation models to a specific product. Evaluators use correlation method to determine the best possible result from this testing.
- Inter-rater Conformance – based solely on human observers rating the product via their preference. This reliability test works well with new products seeking qualitative feedback.
- Consistency / Dependency Qualification – by using related product models, the tester can measure the effectiveness of a construct against another.
While reliability tests provide conclusive results, it won’t have any value without a validity measure. The forms of validity valuation is as follows:
- Face Value – this is the immediate understanding of how well a product should perform.
- Constructive Measure – limits the pretense, context, and parameters of reliability test to keep track of proposed product features.
- Criterion-based Assessment – involves the projection of product performance via the utilization of related criterions.
- Formative Sampling – facilitates a rubric matrix to interpret and highlight the different areas in a reliability test for development and research.
- Survey Content – integrates the reliability test to all covered areas within the scope of the product market reach, concept, and targeted elements.
Reliability and validity are inter-related focal points that determine product fulfilment and quality. Validity makes sure reliability tests remain true to their objectives.