The real value method was initially regulated on a national level in 2012 in the Real Value Guideline (SW-RL). The conventional criticism concerning said method, the problem of converting (building) costs into (market) values (today almost exclusively with the help of the real value factor), is still prevailing. Now however, the standardized method allows the possibility to compare real value factors nationally. To perform such a comparison solely with the help of various statistical procedures is very complex, presenting results that are almost impossible to comprehend for experts with no statistical background. This is where the standardization procedure in value assessment offers an approach, in conjunction with statistical methods, to a solution that may lead to reasonable and discussable outcomes.