CHAPTER ONE
1.1    GENERAL INTRODUCTION
    It is important to note that quality control is an important function.
It is so vital that it helps an organization to have competitive edge over the competitors in the market.
A company can conveniently through quality has effective quality policy out-sales competitors’ product in the market.
When we talk about “quality” the definition most people have in mind is “high quality” which is something describable concept, the word is Item used to mean superior quality, but from purchasing angle the acceptable definition of quality is “totality of feature and characteristics of product or service that bear on its- ability to satisfy a given purpose.
“Quality control” in purchasing angle means regulating manufacturing process in order to maintain the required quality.
The management executive is in an excellent position of their company’s profit that originates in the area of quality. The researcher is interested in the topic, because quality is everybody’s focus in an organization.
1.2    HISTORICAL BACKGROUND OF DOYIN INVESTMENT NIGER1A LIMITED.
    Doyin investment company formal known as the Global Soap and Detergent Industry limited incorporated in October 1984 under the commerce and industry act in 1986 the company is situated along Asa-Dam Road in Ilorin West Local Government in Kwara State and the company specialized in production of soap, extra power flash, clean and wash rite.
In 1985, all the plants were received into the site and the process of installation commence immediately. The commissioning of the industry was done towards the end of the year 1985, the Global Soap and Detergent industry is an affiliate of Doyin Group of Companies” which has it head office at Lagos, the man Doyin himself is an indigene of Kwara state and the name of his home town is “Agbamu” he sited the industry in the state capital so as to reduce unemployment in the state and outside the state.
Some of the materials used in producing are imported materials but  a lot of research is going on as for them to make use of local material and such materials used include the following: blank crop, sodium syndicate etc based on what is written down there is need to look into the organizational structure.
The organizational structure of Global Soap and Detergent can be said a situation where subordinates are responsible to their superior officers. The top on the list is the General Manager and he is the head of the industry and the sole responsibility of the whole operations rests on lam, he gives order on any important issue e.g. may be there is need to purchase capital requirement or if they are to buy large quantity of material involving huge amount of money after the general manager comes the technical manager under the technical manager is engineering and administration, the technical stores, packaging and the clerks.
The production manager also comes under the general manager and the report directly to him, under the production, manager, we have
The raw material stores, followed by purchasing store supervisor, clerks and the cleaners in the raw material store, the component of raw materials kept there are:
a)    STPP (Sodio Tropoli Fops tap)
b)    Sodium syndicate
c)    Glue
d)    Blank cap
e)    Blue dye
f)    Perfume
All these materials are kept in the raw materials store until they are needed, The STPP (SodioTropoli Fopsta (O) is in a separate tank with we provision of tap as they are being dissolved by water, some is passed to the next machine were the operations starts. The sodium syndicate used to neutralize the acid of the detergent during the production Glue, Blank Crop and caustic soda also part of the raw materials used for production of the detergent and during this period the detergent is in white colour, the blue dye white colour to blue and what is how it goes for other soaps and detergent they produce. At the final stage the perfume is mixed and it makes the detergent to give a passive odour.
Also under the General Managers is the quality Control and under him, we have the preliminary design and under the design comes the supervisor, the clerks and security. The quality control manager in collaboration with design and engineering department works on how chemical should be used, the system of packing, packaging, what type of colour that will attract the customers, the dimension and hardness so that it does not get spoilt any how. The quality control manager also hare some link with the production department which have the purchasing under the department and the area of how the right quality or materials purchased for organization.
Another department that comes under the general manager is the finance department, the finance manager report directly to the general manager on the financial aspect of the organization. The financial department receives all relevant documents from store such as Good receive which will note, all the document connected with purchase of materials which will used in preparing the final budget of the organization.