Classification of Marble Blocks Using AHP Assisted TOPSIS and GRA Methods

In this paper, marble blocks which are cut as slabs or stripes were classified by multi criteria decision methods, topsis and gra. for this purpose, at the first stage 20 marble blocks from same basin examined their structural features i.e. cracks, fissures, gaps, sizes etc. at the second stage they were cut by circular saw blade machine as stripes. the cutting operations data showed that there are 6 parameters to classify the blocks such as block sizes, discontinuities, block shapes, production, paledyen and waste ratios. weighting of the criteria were described by ahp. finally, the blocks ranking was determined by topsis and gia methods.results, when topsis and gra results showed increasing linear relationship with the block sizes decreasing linear relationship with the discontinuity frequencies. on the other hand, it has been determined that order of importance for some blocks differs according to the methods. for this reason, it was recommended that solving and evaluating the classification problems by different methods instead of using only mcdm methods.