Modelling the delivery and laying of concrete mix

The aim of this paper is to indicate solutions which fulfil the conditions for laying concrete mix before it starts setting. Using models M/M/N/-/N, for organization I for the so-called delivery directly after unloading, with automatic transfer of information using the RFID system, and M/M/1/FIFO/N/F, for organisation II with transportation units working in closed cycle. Of example, organisation I, with RFID system is more advisable as it is characterised by a shorter waiting time on construction sites; and longer at the concrete-mixing plant. At the same time, it increases the efficiency of working units compared with organisation II which has self-regulating transportation units running in closed cycle.