project work is designed to give an insight into the application of statistical
quality control in the building products industries in order to help
manufacturers understand the importance of applying statistical techniques in
controlling quality products. In addition to make consumers have faith in
standard quality of products they buy.
must also be remembered that goods are competitive, for producers to excel in
the competitive market; their products must match in quality with those of their
project work has seemingly and exhaustively x-rays the quality of Emenite
roofing products in order to check why products are not meeting customers
expectations. From the analysis using statistical quality control procedures
that discovered that corrugated sheets staged from their means which
consequently resulted from the process average being out of control.
this research work is a bird eye new of what quality control techniques can do
for checking, monitoring and enhancing products quality.
TABLE OF CONTENTS
CHAPTER ONE: INTRODUCTION
Background of the study
Purpose of the study
Significance of the study
Statement of research problem
Scope of the study
Definition of key terms
Meaning of statistical quality control
Origin of quality control
Statistical techniques in quality control
Important of statistical quality control officer
Data collection method
Population and sample
Technique for analysis
ANALYSIS AND INTEPRETATION
Quality control chart
Laboratory record of measurement of flatsheets
Laboratory record of measurement of corrugated sheet
To check process average & variability for that sheet
To check process average & variability for corrugated
Determination of the process standards
SUMMARY, CONCLUSION AND
1.1 BACKGROUND OF THE
Limited Enugu a member of the Beligian Etex Group started operation in 1963
under the name “Turners Asbestos Cement Company Nigeria Limited: The company was
incorporated in 1961 with registration number RC 2712.
group came to Nigeria with the establishment of her first of four companies in
Ikeja, Lagos, Nigeria Limited. The other three are Eternite Limited, Sapele,
Giwarite Limited, Kano and Emenite Limited, Enugu.
Limited after being established have to following as shareholders.
Newall Ltd - 80%
Eastern Nigeria - 20%
result of the indigenization decree of 1973, the shareholders of the company
changed as follows
& Newall Ltd - 60%
of Eastern Nigeria - 40%
With the name of
the company changing to Turners Building Product (Emene) Limited.
to dwindling fortunes of the company, in March 24, 1988 Turners and Newall Ltd
divested its interest in the company and transferred 51% of its shareholding to
Eteroutremer Societe Anonyme of Belgium (now Etex Group S.A) and the balance of
49% went to the then Anambra and Imo State; now Anambra, Enugu, Imo, Abia and
Ebonyi States. As a result of the new shareholding arrangement, the company
changed its name to Emenite Limited as its presently known.
Limited after being established in 1963 rolled out her first finished sheets in
December that year. The company has a total workforce as at its establishment
of 67 staff, its second machine was installed in 1979 while the third was
installed in 1983. From a workforce of 67 to 225 staff, from one shift machine
to three, from 14,000 tonnes of roofing and ceiling sheets to 50,000 tonnes per
year. The company has continued to grow tremendously.
company has made considerable progress in terms of product development in the
market. It operates in the roofing and ceiling market, its range of products
include: Bigsix & standard ultimate corrugated sheets of different colours
(Grey, Red & Green), prestige concrete tile, Emcee flat sheet, duraceile
decorative ceiling, Emlux decorative ceiling as well as Qualitile decorative
ceiling and a new product called duratile. These products are sold through a
wide range of distribution network located in such a place that they will be
close to project sites. Emenite is 150 certified, 150 9002 in 1998, 180 9001
is the company’s quality policy to provide high quality building products to
the markets. But much recently there have been complaints from building and
construction companies over the quality durability of her products. It is in
view of this problem this research work is being undertaken.
OF THE STUDY
of goods and services rely on quality standard products displayed for
consumers. What is responsible for this trend? Is statistical quality control
standard still made use of in industries? This are what this research project
intend to solve and make appropriate recommendation.
project research will
the process standards and establish the process capability
2. Check if the process average and variability are
under control in respect of the measurement of flat sheet.
3. Check if the process average and variability are
under control in respect of the measurement of corrugated sheets
4. Set up appropriate control charts for monitoring
the future output of the process.
SIGNIFICANCE OF THE STUDY
The significance of this research work
is to provide information for the management to fine – tune its quality policy
concerning their products as obtained in this analysis of this research work.
This will be of benefits t o the producers and consumers as well.
OF RESEARCH PROBLEM
have been complaints and doubts that most asbestos roofing sheets in recent
times full short of required standard, also whether established standardize are
still maintained. This was as a result of reported cases of easy damage and
non-durable nature of these sheets.
In view of
this, the researcher intends to carry out this research using Emenite Limited
Enugu as a case study.
process is under control in respect of the average and variability of the
measurement of flat sheets.
H1: The process is not under control in
respect of the average and variability of the measurement of flat sheets
H0: The process is under control in respect of
the average and variability of the measurement of corrugated sheets
H1: The process is not under control in
respect of the average and variability of the measurement of corrugated sheets.
1.6 SCOPE OF THE STUDY
The scope of this study is limited to Emenite only in
order to conclude the research work at the assigned period and the findings
will be used to infer on the industry.
1.7 DEFINITION OF KEY TERMS
VARIATION: This is a deviation
from the normal standard or condition
DATA: These are sets of
figures, raw information that is yet to be processed. e.g population data,
employment data etc.
CONTROL CHARTS: It is the graphical display
of the actual measurement of the characteristic on a chart showing limit which
reflect the process capability on the particular quality characteristics.
PROCESS CONTROL: This is the act of observing
the functions of each of the factors leading to the production of goods on a
continuous basis to ensure the process or means of production are kept in
PRODUCT CONTROL: Product control is the act of
measuring or observing different attributes of quality specification of a
product with the aim of ensuring that the product conform to specification.
This is done of taking a sample from a batch of inspection lot with the aim of
accepting or rejecting it.
STATISTICAL QUALITY CONTROL: This is the
technique of sampling at every stage of production and statistical inferences
are taken about the variability of the product quality.
PROCESS CAPABILITY: This is the mini9mum spread of
specific measurement variation which will include about 99.73% of all
measurements from the process.