Table 2: The differences between the proposed methodology and the previous fuzzy collaborative forecasting methods.

MethodTargetForecasting methodAggregation mechanism

Büyüközkan et al. [22, 31]DemandFCMSubjective collaboration
Chen [27]Unit costFLR + LPLP
Chen [26]Foreign exchange rateFLR + 2 NLPFI + BPN
Chen [25]Unit costFLR + 2 NLPFI + BPN
The proposed methodologyProductivityFLR + 3 NLPFI + BPN

FCM: fuzzy cognitive map; FLR: fuzzy linear regression; LP: linear programming; NLP: nonlinear programming; FI: fuzzy intersection; BPN: back propagation network.