Transporting goods using a fleet of vehicles

This disclosure relates to transporting goods using a fleet of vehicles that is optimised. A processor solves a linear program to optimise a cost value by selecting one of multiple fleet configuration candidates comprising a number and type of vehicles that 5 meet a transport demand at minimum cost. The linear program comprises constraints associated with multiple days. The processor then determines for one of the multiple days a further fleet configuration candidate based on an output of solving the linear problem and adds the further fleet configuration candidate to the multiple fleet configuration candidates by including an additional corresponding column into the 10 linear program. The steps of solving the linear program, determining a further fleet configuration candidate and adding the further fleet configuration candidate to the multiple fleet candidates are then repeated until a termination condition is met. A-1I Fig. 1 210 data _'0 206 j Fig. 2