Article Sidebar
Published:
Jun 2, 2022DOI:
10.4314/njt.v41i2.6Keywords:
Article Details
Copyright belongs to the Faculty of Engineering, University of Nigeria, Nsukka, Nigeria
The contents of the articles are the sole opinion of the author(s) and not of NIJOTECH.
NIJOTECH allows open access for distribution of the published articles in any media so long as whole (not part) of articles are distributed.
A copyright and statement of originality documents will need to be filled out clearly and signed prior to publication of an accepted article. The Copyright form can be downloaded from https://www.nijotech.com/downloads/COPYRIGHT%20FORM.pdf while the Statement of Originality is in Statement of Originality.pdf (nijotech.com)
For articles that were developed from funded research, a clear acknowledgement of such support should be mentioned in the article with relevant references. Authors are expected to provide complete information on the sponsorship and intellectual property rights of the article together with all exceptions.
It is forbidden to publish the same research report in more than one journal.
Main Article Content
Determination of the stability of a potable water production line using lean six sigma method: A case study of XYZ water factory
Abstract
The research, being a case study, aims to determine the stability of the potable water production line of XYZ water factory, for possible improvement, using tools from the lean six sigma (LSS) methodology. This research was carried out on the mean weekly laboratory results of physicochemical water parameters (pH, conductivity, turbidity, alkalinity, chloride, total dissolved solids (TDS), magnesium, nitrates, sulphate, hardness, calcium, lead, copper, iron, and zinc) for regulatory purpose. The data obtained were analysed using control charts from the minitab 2021 ® statistical software package. The values of the parameters (except iron) in the control charts were beyond the conventional limits at various points in time throughout the period. The research results showed that the water production process is not stable, indicative of assignable causes of variability in the production line for all the parameters. Therefore, there is need to carry out investigations to know the causes and take action to correct them. This could be achieved by deploying the appropriate tools in the lean six sigma (DMAIC) methodology.
