Validation is the documented evidence that a test or a facility meets the requirements in practice. Validation is also referred to as test for plausibility.

For example, most bugs and security problems are the lack of plausibility of input values set.

In software quality assurance validation is described as the relative suitability of the test (the value) of software on its intended use. This aptitude test is based on the previously established requirement profile. It can be realized technically and by personnel.

In the validation in the medical field (production) it is tested at the end product if the process always produces the desired result under the same conditions as for example the temperature. This validation must be performed again for each new product no matter if it is equivalent to the device or if it is the same device. Especially in medical and aviation technology test stations and software have to be validated. SPS electronic transacts especially for test systems in these two industries specific validations. Test systems of SPS enjoy an excellent reputation in the industry. Quality and service, accessory range and maintenance directly at the factory are full-service characteristics of the company.