A Methodology for Green Supplier Selection in Food Industries - Technology Management for Sustainable Production and Logistics - page 16

Table 6 Distances of each alternative to the positive and negative ideal solution closeness index
and ranking of criteria
Criteria R + R − CI Rank

Qualitative 0.025 0.077 0.754 2

0.041 0.070 0.628 4

Financial

0.070 0.041 0.371 6

Management and organization

Services 0.012 0.084 0.869 1

0.073 0.027 0.270 8

Production technology

0.025 0.075 0.744 3

EMS

Green image 0.068 0.025 0.268 9

0.084 0.012 0.130 10

DE

0.064 0.064 0.498 5

EIC

Green competencies 0.059 0.033 0.358 7

Table 7 Description of high ranked criteria
Criteria Description

On time delivery, after sales service and production
capacity

Service

Qualitative Quality of material, labor and operation

Proposed price, capital and financial power of company

Financial

EMS Environmental prerequisite, planning and certificates

High ranked criteria interfere in supplier selection process which may not be
assumed to be equal importance. Weight of high ranked criteria calculated in a
similar way to section B (Eqs. 1 - 4 ) from the paired comparison between the crite-
ria. After pairwise comparison, evaluation matrix constructed (Eq. 13 ) and weights
computed using AHP method.

1
3
61 3 3
4315
3

1
6

1
4

1

A =

(13)

1
3

1
5

1

In this research W represents a set of grades of four high ranked criteria importance
(Table 8 ).

4.5 Part E

After initial screening, some candidates (i.e. potential alternatives for PMS) are
selected by experts but the names are not given and abbreviated in a 1 , a 2 and a 3 for
steel sheet suppliers and b 1 , b 2 and b 3 for PET granule suppliers.