Research Paper Scheduling
1. Development of a doctor scheduling system: a constraint satisfaction and penalty minimisation scheduling model

T. Chawasemerwa; I. W. Taifa; D. Hartmann

Volume 7, Issue 4 , December 2018, Pages 396-422

http://dx.doi.org/10.22105/riej.2018.160257.1068

Abstract
  Doctor scheduling is a complex, costly and time-consuming exercise. This study develops a constraint satisfaction and penalty minimisation scheduling model for meeting ‘hard constraints’ and minimises the cost of violating ‘soft constraints’, i.e. the user inputs, the total number ...  Read More

Research Paper
2. A framework to evaluate and improve supply chain: FAHP based case study on a supermarket

S. Haldar; C. L. Karmaker; Sk. R. Hossain

Volume 7, Issue 4 , December 2018, Pages 423-440

http://dx.doi.org/10.22105/riej.2018.80556

Abstract
  Nowadays, the supply chain has become a buzzword in the business field. The only supply chain can help to lead a business in an organized way. However, in a supermarket, the supply chain is very important, but they need to ensure better communication with the supplier, customer, and internal management ...  Read More

Research Paper Total quality management and quality engineering
3. Implementation of fuzzy rule-based algorithms in p control chart to improve the performance of statistical process control

Md. F. Rabbi; N. Chakrabarty; J. Shefa

Volume 7, Issue 4 , December 2018, Pages 441-459

http://dx.doi.org/10.22105/riej.2018.150727.1062

Abstract
  In the statistical process control when the process is very sensitive and control limit shifts are the prime concerns, there fuzzy control charts can be a better solution. In decision making, extra “rather in control” and “rather out of control” decisions facilitate to find out ...  Read More

Research Paper Economics
4. Optimum solar and wind model with particle optimization (PSO)

N. Salehi; H. R. Askarzadeh

Volume 7, Issue 4 , December 2018, Pages 460-467

http://dx.doi.org/10.22105/riej.2018.148836.1059

Abstract
  Although the development of science and technology in the present era has increased human satisfaction from life, it has caused the problems such as environmental pollution and increased demand for energy carriers, especially fossil fuels. Considering that fossil fuels can be exhausted, the most suitable ...  Read More

Research Paper Inventory, logistics, and transportation
5. Trend extrapolation of domestic air travel demand in Nigeria (2018-2030)

A. Adetayo Adeniran; K. Olufunto Adedotun

Volume 7, Issue 4 , December 2018, Pages 468-481

http://dx.doi.org/10.22105/riej.2018.143367.1052

Abstract
  Trend analysis of domestic air travel demand in Nigeria was examined based on yearly passenger demand from 2010 to 2017. Ordinary Least Square (OLS) regression was used to forecast for twelve years (2018 to 2030) demand for domestic air passenger travel in Nigeria. The demand for domestic air passenger ...  Read More

Research Paper
6. Cloud-based IoT: integration cloud computing with internet of things

Javad Pourqasem

Volume 7, Issue 4 , December 2018, Pages 482-494

http://dx.doi.org/10.22105/riej.2018.88380

Abstract
  Internet of Things (IoT) technology is based on interconnected things in a dynamic and distributed environment. The IoT contains many widely pervasive and heterogeneous small things with limited storage, energy resources, and processing capacities. These limitations are an obstacle for developing IoT ...  Read More