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21-Feb-2017 12:16

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The existence of program defects or inadequacies is inferred from unexpected system outputs.Testing may be carried out during the implementation phase to verify that the software behaves as intended by its designer.

One of the most common problems seen today with validation studies is the lack of proper URS or specification documents detailing exactly what is required from a system/equipment/process.

Further details on the validation processes for the three levels are given in Annex B of EG 201 015.

Each validation level carries its own overlapping set of responsibilities that need to be considered and these are identified in the table below.

This 'functionality' refers to services, tasks or functions the user performs using the system in question.

In product development, it is important to understand the difference between the baseline functionality necessary for any system to compete in that product domain, and features that make the system different from their competitor's products. A technical specification describes the internal implementation of the software.

Static techniques can only check the correspondence between a program and its specification (verification).