forvregning

Could you clarify what you mean by "forvregning"? The term does not appear to be widely recognized in standard reference sources, and its exact meaning may depend on the language (Norwegian, Danish, etc.) and the context (economics, statistics, linguistics, computing, etc.). If you can indicate the intended domain and language, I can draft a concise, neutral Wikipedia-style article under 300 words. If you prefer, I can also provide a general overview by treating "forvregning" as a hypothetical concept related to forecasting or projection in planning.