Then you will be in a position to select the most appropriate evaluation tools for your validation project. Check if you can immediately apply the selected evaluation tools, or if training is needed. Choose to either buy and use the evaluation tools yourself or to ask external experts for help. If an evaluation tool is expensive and requires much learning effort before it can be used, and if you plan to use this tool only once, then it will be advantageous from an economical point of view not to acquire the tool but to look for an expert who has the tool and the expertise. For example, a SME would not set up a usability lab if the plan is to use it only 20 days per year.
Most validated tools have a good, broad level of applicability.
Search for a standard method and tool first. Only develop specialised techniques if the available methods and tools are not applicable or the information needed is very specific to the application being evaluated. A qualitative method is one that yields data in terms of words, or pictures, but does not lend itself to yielding data in terms of numbers. Interview data yield another. A quantitative method is one which yields numbers.