The paper presents and discusses two experimental simulation results. The first one concerns the influence of the unitary virtual force value of the virtual forces algorithm on the quality of solutions later used as inputs to the CRAFT algorithm operating on a regular grid. The analysis is conducted in relation to known optimal values of the examined layouts with two different scales used to define relationships between objects. The second experiment analyses the impact of the links’ density and the dispersing to contracting force relationship on the effectiveness of prompts generated by the virtual force algorithm. The presented experimental designs take into account two sizes of problems: small – 25 and large - 100 objects in two arrangements typical in manufacturing logistics.