Approaches To Green Supplier Evaluation Under Uncertain Environment

With the damage to the human environment and the earth's resources increasingly depleted,the traditional supply chain has been gradually not well adapted to the current needs of the times and social demand,thus,the concept of "green supply chain" was introduced.The construction of green supply chain has become the main challenges and trends to provide a green product and towards sustainable development of society for the current time,in which an important part of the core content and implementation of green supply chain is green supplier evaluation and selection,especially sustainable suppliers in line with environmental protection requirements.Since the selection of suppliers plays a decisive role in the green supply chain management,which directly determines the optimization and core competitiveness of the entire chain of the enterprise,therefore,how to efficiently identify a required supplier from a number of suppliers is a key issue in modern green supply chain management must be solved.The purpose of this article is to study and discuss the problem of green supplier evaluation in the uncertain information environment,and utilize some evaluation index and evaluation methodology to conduct a comprehensive assessment.In this paper,the main research contents and main results include the following aspects.(1)The establishment of evaluation index system for green suppliersIn establishing a green supplier evaluation index system,not only to consider the economic indicators focused by traditional vendor evaluation,but also consider green indicators on resource utilization and environmental protection in two ways.Firstly,based on the principles and steps to build on the green supplier evaluation index system,and reference a great deal of literature in home and abroad,a green supplier evaluation index system having characteristics of environmental assessment is established through gradual regression.The index system contains four level indicators,16 secondary indicators and 56 third-level indicators.(2)The evaluation method of green supplier based on the hesitant fuzzy setFor the green supplier evaluation problem that the attribute weight information is determined and attribute values is in the form of hesitant fuzzy elements,the HF-ELECTRE decision-making method is proposed.For the green supplier evaluation problem that the attribute weight information is unknown and attribute values is in the form of hesitant fuzzy elements,based on the Shapley theory and fuzzy measure,the induced generalized hesitant fuzzy hybrid Shapley averaging(I-GHFHSA)operator and the induced generalized hesitant fuzzy hybrid Shapley geometric(I-GHFHSG)operator that having more fusion comprehensive information are proposed.And the optimal fuzzy measure determination model is established.Finally,an approach for green supplier selection is developed on the basis of these operators.(3)The evaluation method of green supplier based on the hesitant trapezoid fuzzy setBased on the hesitant fuzzy set and trapezoid fuzzy number,the hesitant trapezoid fuzzy set is defined.For the green supplier evaluation problem that the attribute is mutual independent and attribute values is in the form of hesitant trapezoid fuzzy set,the hesitant trapezoid fuzzy weighted averaging(HTrFWA)operator and hesitant trapezoid fuzzy weighted geometric(HTrFWG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.For the green supplier evaluation problem that the attribute is unknown and attribute values is in the form of hesitant trapezoid fuzzy set,based on the combination of prospect theory and grey correlation method,An approach is developed to solve green supplier selection when the attribute weight is known,partly known and completely unknown.For the green supplier evaluation problem that the attribute is correlative and attribute values is in the form of hesitant trapezoid fuzzy set,the hesitant trapezoid fuzzy Einstein weighted averaging(HTrFEWA)operator and hesitant trapezoid fuzzy Einstein weighted geometric(HTrFEWG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.(4)The evaluation method of green supplier based on the hesitant triangular fuzzylinguistic setBased on the hesitant fuzzy set and triangular fuzzy linguistic set,the hesitant triangular linguistic set is defined.For the green supplier evaluation problem that the attribute is mutual independent and attribute values is in the form of hesitant triangular fuzzy linguistic set,the hesitant triangular fuzzy linguistic weighted averaging(HTFLWA)operator and hesitant triangular fuzzy linguistic weighted geometric(HTFLWG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.For the green supplier evaluation problem that the attribute is unknown and attribute values is in the form of hesitant triangular fuzzy linguistic set,based on the combination of VIKOR and correlation coefficient method,an approach is developed to solve green supplier selection when the expert and attribute weight is known,partly known and completely unknown.For the green supplier evaluation problem that the attribute has different priorities and attribute values is in the form of hesitant triangular fuzzy linguistic set,the hesitant triangular fuzzy linguistic prioritized averaging(HTFLPA)operator and hesitant triangular fuzzy linguistic prioritized geometric(HTFLPG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.(5)The evaluation method of green supplier based on the hesitant trapezoid fuzzylinguistic setBased on the hesitant fuzzy set and trapezoid fuzzy linguistic set,the hesitant trapezoid fuzzy linguistic set is defined.For the green supplier evaluation problem that the attribute is mutual independent and attribute values is in the form of hesitant trapezoid fuzzy linguistic set,the hesitant trapezoid fuzzy linguistic weighted averaging(HTrFLWA)operator and hesitant trapezoid fuzzy linguistic weighted geometric(HTrFLWG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.For the green supplier evaluation problem that the attribute weight is unknown,attribute is correlative and attribute values is in the form of hesitant trapezoid fuzzy linguistic set,based on the combination of Choquet integral and Shapley theory,the hesitant trapezoid fuzzy linguistic Choquet averaging(HTr FLCA)operator,hesitant trapezoid fuzzy linguistic Choquet geometric(HTrFLCG)operator,hesitant trapezoid fuzzy linguistic Shapley Choquet averaging(HTrFLSCA)operator and hesitant trapezoid fuzzy linguistic prioritized geometric(HTrFLSCG).An approach for green supplier selection is developed on the basis of these operators.(6)The evaluation method of green supplier based on the simplified neutrosophichesitant fuzzy setsBased on the hesitant fuzzy set and simplified neutrosophic sets,the simplified neutrosophic hesitant fuzzy sets is defined.For the green supplier evaluation problem that the attribute values is in the form of simplified neutrosophic hesitant fuzzy sets,the simplified neutrosophic hesitant fuzzy Hamacher weighted averaging(SNHFHWA)operator and the simplified neutrosophic hesitant fuzzy Hamacher weighted geometric(SNHFHWG)operator are defined.An approach for green supplier selection is developed on the basis of these operators.For the green supplier evaluation problem that the attribute weight is unknown and attribute values is in the form of simplified neutrosophic hesitant fuzzy set,based on the combination of LINMAP method and QUALIFLEX theory,an SNHFS-QUALIFLEX approach for green supplier selection is developed.Finally,SNHFS-ELECTRE method and SNHFS-PROMETHEE is proposed to compare with SNHFS-QUALIFLEX.