Robust Design and Optimization of Production Wastes: An Application for Industries

World Academy of Science, Engineering and Technology 76 2013

8 Pages Posted: 21 Jan 2017 Last revised: 3 Aug 2018

See all articles by Christopher Ihueze

Christopher Ihueze

Nnamdi Azikiwe University

C. C. Okpala

Nnamdi Azikiwe University

Christian Emeka Okafor

Nnamdi Azikiwe University

Peter Ogbobe

National board for Technology Incubation

Date Written: January 19, 2017

Abstract

This paper focuses on robust design and optimization of industrial production wastes. Past literatures were reviewed to case study Clamason Industries Limited (CIL) - a leading ladder-tops manufacturer. A painstaking study of the firm’s practices at the shop floor revealed that Over-production, Waiting time, Excess inventory, and Defects are the major wastes that are impeding their progress and profitability. Design expert8 software was used to apply Taguchi robust design and response surface methodology in order to model, analyse and optimise the wastes cost in CIL. Waiting time and overproduction rank first and second in contributing to the costs of wastes in CIL. For minimal wastes cost the control factors of overproduction, waiting-time, defects and excess-inventory must be set at 0.30, 390.70, 4 and 55.70 respectively for CIL. The optimal value of cost of wastes for the months studied was 22.3679. Finally, a recommendation was made that for the company to enhance their profitability and customer satisfaction, they must adopt the Shingeo Shingo’s Single Minute Exchange of Dies (SMED), which will immediately tackle the waste of waiting by drastically reducing their setup time.

Keywords: Excess-inventory, setup time, single minute exchange of dies, optimal value, over-production, robust design

Suggested Citation

Ihueze, Christopher and Okpala, C. C. and Okafor, Christian Emeka and Ogbobe, Peter, Robust Design and Optimization of Production Wastes: An Application for Industries (January 19, 2017). World Academy of Science, Engineering and Technology 76 2013. Available at SSRN: https://ssrn.com/abstract=2902171

Christopher Ihueze

Nnamdi Azikiwe University ( email )

Enugu-Onitsha Expressway
PMB 5025
Awka, DE Anambra State 234
Nigeria

C. C. Okpala

Nnamdi Azikiwe University ( email )

Enugu-Onitsha Expressway
PMB 5025
Awka, DE Anambra State 234
Nigeria

Christian Emeka Okafor (Contact Author)

Nnamdi Azikiwe University ( email )

PMB 5025
DE Anambra State
Nigeria

Peter Ogbobe

National board for Technology Incubation ( email )

Nigeria

Here is the Coronavirus
related research on SSRN

Paper statistics

Downloads
6
Abstract Views
143
PlumX Metrics