This project work is intended to provide insight into the application of statistical quality control in the building products industries in order to assist manufacturers in understanding the importance of employing statistical techniques in quality control. Furthermore, consumers must have faith in the standard quality of the products they purchase.

It should also be remembered that goods are competitive; in order for producers to excel in a competitive market, their products must be of comparable quality to those of their competitors.

This project work appears to have thoroughly examined the quality of Emenite roofing products in order to determine why products are failing to meet customer expectations. The analysis using statistical quality control procedures revealed that corrugated sheets staged from their means, which resulted in

The process average has gotten out of hand.

In general, this research work provides an overview of what quality control techniques can do to check, monitor, and improve product quality.




Emenite Limited Enugu, a subsidiary of the Belgian Etex Group, began operations in 1963 as “Turners Asbestos Cement Company Nigeria Limited: The company was incorporated in 1961 with registration number RC 2712.

The group arrived in Nigeria and established the first of four companies in Ikeja, Lagos, Nigeria Limited. Eternite Limited, Sapele, Giwarite Limited, Kano, and Emenite Limited, Enugu are the other three.

Emenite Limited, once established, must have the following shareholders.

Turners & Newall Ltd owns 80% of the company.

East Nigerian Government – 20%

As a result of the 1973 indigenization decree, the company’s shareholders changed as follows:

Turners & Newall Ltd owns 60% of the company.

40%: Eastern Nigerian Government

Turners Building Product (Emene) Limited is the new name of the company.

Due to the company’s declining fortunes, Turners and Newall Ltd divested its interest in the company on March 24, 1988, transferring 51% of its shareholding to Eteroutremer Societe Anonyme of Belgium (now Etex Group S.A) and the remaining 49% to the then Anambra and Imo State; now Anambra, Enugu, Imo, Abia, and Ebonyi States. The company’s name was changed to Emenite Limited as a result of the new shareholding arrangement.

Emenite Limited, founded in 1963, produced her first finished sheets in December of that year. The company had 67 employees when it was founded, and its second machine was installed in 1979, followed by the third in 1983. Among a workforce

from 67 to 225 employees, from one shift machine to three, and from 14,000 to 50,000 tonnes of roofing and ceiling sheets per year. The company has expanded tremendously.

In terms of market product development, the company has made significant strides. Its products include: Bigsix and standard ultimate corrugated sheets in various colors (Grey, Red, and Green), prestige concrete tile, Emcee flat sheet, duraceile decorative ceiling, Emlux decorative ceiling, Qualitile decorative ceiling, and a new product called duratile. These products are sold through a diverse distribution network that is strategically located near project sites. Emenite is a 150 certified company that was founded in 1998.

180 9001 in 2002.

The company’s quality policy is to provide markets with high-quality building products. However, building and construction companies have recently complained about the quality and durability of her products. This research is being conducted in response to this issue.


Consumers rely on quality standard products displayed for them when purchasing goods and services. What is the cause of this trend? Is the statistical quality control standard still used in industry? This research project intends to address these issues and make appropriate recommendations.

The project investigation will

1. Determine the process standards and the process capability.

2. Determine whether the process average and variability in flat sheet measurement are under control.

3. Determine whether the process average and variability in corrugated sheet measurement are under control.

4. Create appropriate control charts to monitor the process’s future output.


The significance of this research work is to provide information for management to fine-tune its quality policy regarding their products based on the results of this research work’s analysis. This will benefit both the producers and the consumers.


There have been complaints and doubts that most asbestos roofing sheets in recent times have fallen short of required standards, as well as whether established standards are still being followed. This was due to reports of easy damage and the non-durability of these sheets.

As a result, the researcher intends to conduct this study using Emenite Limited Enugu as a case study.


H0: The process is under control in terms of the average and variability of flat sheet measurement.

H1: The process is not under control in terms of the average and variability of flat sheet measurement.

H0: The process is under control in terms of the average and variability of corrugated sheet measurement.

H1: The process is not under control in terms of the average and variability of corrugated sheet measurement.


The scope of this study is restricted to Emenite in order to complete the research work within the time frame specified, and the findings will be used to infer on the industry.


VARIATION: A deviation from a normal standard or condition.

DATA: These are sets of numbers, raw information that has yet to be processed. For example, population data, employment data, and so on.

CONTROL CHARTS: A control chart is a graphical representation of the actual measurement of a characteristic on a chart that shows the limits that reflect the process capability on the specific quality characteristics.

PROCESS CONTROL: This is the act of continuously observing the functions of each of the factors leading to the production of goods in order to maintain the process or means of production in optimal condition.

PRODUCT CONTROL: Product control is the act of measuring or observing various attributes of a product’s quality specification in order to ensure that the product meets the specifications.

conform to specification. This is accomplished by taking a sample from an inspection lot batch with the intent of accepting or rejecting it.

STATISTICAL QUALITY CONTROL: This is a sampling technique used at each stage of production to make statistical inferences about the variability of product quality.

PROCESS CAPABILITY: This is the smallest range of specific measurement variation that will include approximately 99.73% of all measurements from the process.



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