QA testing is a process that verifies the product or site compliance to the specs and requirements in different environments, with different loads, safety, ergonomics and usability requirements. Zfort Group's QA services can be provided as part of a development project, or they can be offered as a standalone service for projects that are being implemented by other vendors. There are five main scenarios of quality assurance outsourcing implementation based on the identified problems in web development: - complete outsourcing of the entire volume of testing and quality assurance; - performance of complex, resource-intensive test researches; - rapid expansion of the company's resources by external testers; - support of existing software by new releases testing; - independent quality auditing.