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The fee for architect and engineering services can often even architects and engineers not calculate correctly, because the underlying fee scale (HOAI) is not easy. For this reason, every third fee calculation is fraught with errors. This is the one for the architects and engineers annoying when you bill less than they would be entitled, on the other hand for the builders, which too high a fee will be charged. Both would do well to use for this complex calculation, a reliable software to both to avoid costly mistakes, on the other hand also save a lot of time, because the manual calculation usually takes hours. With this Excel 2021, you can determine the price HOAI for buildings, space-creating interior, outdoor installations, structural engineering and technical equipment by entering the eligible costs, fees zone and fee rate. The specialty of this HOAI program is a breakdown of the fees set according to individual services (eg quantity determination or elaboration of project documentation). The program includes the evaluation panels for partial performance by newly revised Oehms table (HOAI Splitter table). This highly differentiated fee deals and calculations are possible. In addition to the result, the table also provides the complete calculation formula: important for the Suitability of the settlement. For if the calculation method is not traceable, the Client (client), a lack of auditability criticize and reject the bill. Of this is also made ??use of extensively in practice, certainly not only because the Zahlungsverw