Research Paper Supply chain management
1. The study of multi-objective supplier selection problem by a novel hybrid method: COA/ε-Constraint

Elham Shadkam; Mahdi Parvizi; Reza Rajabi

Articles in Press, Accepted Manuscript, Available Online from 29 June 2021

http://dx.doi.org/10.22105/riej.2021.277170.1191

Abstract
  Today, paying attention to the interests of suppliers in supply chain management strategies is one of the important points in the success of long-term and strategic relationships with suppliers. Not paying enough attention to these points sometimes causes irreparable damage to the overall structure of ...  Read More

Research Paper Mathematical modelling
2. Some Results on (c)-mapping

Linxin Li; Fengqiong Wang; Wu Dingping

Articles in Press, Accepted Manuscript, Available Online from 04 September 2021

http://dx.doi.org/10.22105/riej.2021.293334.1232

Abstract
  Compared with [1], in this paper, We will give first some sufficient conditions under which a (c)-mapping possesses an approximate fixed point sequence (AFPS). And then, we will prove that (c)-mapping has a fixed point. Finally, we will check some special properties of the fixed point sets of these mappings, ...  Read More

Research Paper Reliability and Quality Engineering
3. Analyzing the Impact of 5S Implementation in the Manufacturing Department: A Case Study

Tasnim Ahmed Tahasin; Himadri Sen Gupta; Noshin Tasnim Tuli

Articles in Press, Accepted Manuscript, Available Online from 18 September 2021

http://dx.doi.org/10.22105/riej.2021.229039.1230

Abstract
  5S is a systematic approach that helps to organize a workplace for increasing efficiency and reduce wasting of productivity by providing an organized safe environment. The objective of this paper is to emphasize the implementation of 5S principles for the workplace by reflecting a tooling problem of ...  Read More