The Conjugated Triangle Method CTM of the detection of inconsistent bids in the construction industry

Warsaw University of Technology, Faculty of Civil Engineering, Institute of Building Engineering, Division of Production Engineering and Construction Management, Al. Armii Ludowej 16, 00-637 Warsaw, Poland

^* Corresponding author: h.anysz@il.pw.edu.pl

Abstract

The existing system of bids evaluation in the construction industry does not bring the clients the certainty if all placed bids comprise real, achievable prices. Especially in the road construction sector, where the earthworks create significant part of the works, comparing e.g. the price of 1 km of roads often gives misleading results. The paper comprises the complete proposal to modify the scope of information provided by offerors in the public procurements (in the construction industry) allowing the clients to determine easily if the contractors have placed the consistent offers i.e. if the bid prices are not too high and if the lowest bid price is not a dumping price. The Conjugated Triangle Method (CTM) of inconsistent bid detection in construction industry is based on the three inter-related parameters: means of production, time of works, on the value of works. Regardless of the offered price it should match the other two parameters.