This research work is an attempt to look into the impact of inventory management and control on performance using a  manufacturing company. It was conducted using Tower Galvanized Products (GTP) Ltd Kaduna. The research work was carried out with the intention of examining the pit falls of manufacturing companies in carrying out necessary management and control of their inventories. For this purpose the study was divided into five chapters. Chapter one introduced the research topic, the objective of the study was also define which include to access and highlight the different methods of inventory, planning and reeducation and the most appropriate one. Chapter two was concerned with the review of related literature and points like objectives of inventory management which include to maintain minimum investment in inventories to maximize profitability were discussed. Chapter three dealt with the methodology used in collecting data. In this chapter the random sampling technique was adopted and questionnaire were used to collect the data. Chapter four has to do with the analysis of the various data collected using the mean. In chapter five, summary of the research work was don and conclusion were drawn to give recommendations in that manufacturing companies with a view to profit maximization and cost reduction should adopt and maintain an effective inventory management and control system


Title page                                         i   

Declaration page                                ii

Approval page                                    iii

Dedication                                     iv   

Acknowledgement                                 v

Abstract                                         vii

Table of contents                                 viii



1.1    Background of Study                         1   

1.2    Statement of the Problem                         4

1.3    Objective of the Study                         6   

1.4    Significance of Study                         7   

1.5    Research Questions                            8

1.6    Scope of the Study                             8

1.7    Limitation of the Study                         9

1.8    Definition of terms                            9


Literature Review                                

2.1    Introduction                                11

2.2   The Concept of Inventory Management             12

2.3    The Nature of Inventory                         14

2.4    Motive for Holding Inventory                     16

2.5    Objective of Inventory Management                20

2.6    Techniques of inventory Management and Control     22

2.7    Economic Order Quantity Model                23    

2.8    Inventory Records                             31

2.9    Inventory Valuation Methods                     35

2.10    Inventory Ordering System                     38

2.11    The Impact of Computer Application on Inventory      Management and control                            41


Research methodology

3.1    Introduction                                 44

3.2    Research Design                             44

3.3    Area of Study                                45

3.4    Population of the Study                         45

3.5    Sample                                     45

3.6    Instrument for Data Collection                     46

3.7    Validity of the Instrument                        47

3.8    Reliability of the Instrument                    47

3.9    Methods of Data Collection                     48

3.10    Methods of Data Analysis                        48  


Data Presentation and Analysis    

4.1    Introduction                                 50

4.2    Characteristics of respondents                     50

4.3    Presentation of Data and Analysis in Tables         54

4.4    Summary of findings                         61

4.5    Discussion of Findings.                         63


Summary, Conclusion and Recommendations        

5.1    Summary                                     66

5.2    Conclusion                                67   

5.3    Recommendations                             69

    Bibliography                                72





    Inventories constitute the most significant part of current events of a large majority of companies in Nigeria and indeed many other part of the world. Because of the large size of inventories maintained by firms, a considerable amount of fund is required to be committed to them. Therefore, the efficient and effective management of inventories becomes imperative in order to achieved unnecessary turnover or to minimized the cost associated with keeping inventories. The neglect of inventory management and control by a firm will amount to jeopardizing its long run profitability and may even cause the firm to fail ultimately.

Inventory is defined as the stock of any item or material used in an organization. Therefore, an inventory management is the set of policies and control that monitor levels of inventory and determines the following:-

i.    What level should be maintain

ii.    When stock should be replenished.

iii.    How large order should be

However, inventory can include input such as human resources, financial, equipment e.t.c and output such as parts or component.

It is possible for a company to reduce its level of inventories to a considerable degree without any adverse effect on production and sales by using inventory planning and control techniques.

The reduction in excessive inventory carries a favourable impact on company profitability (Pandey 1999) in doing this however, care should be taken to avoid under stocking which directly affect production causing stoppage, loss of sales, loss of good will. etc.

Inventory forms a link between production and sales of a product. A manufacturing company must maintain a certain level of inventory in the form of raw materials, work in progress and finished goods. Raw materials inventory gives the firm flexibility in its purchase, without it, a manufacturing company must exist on a hand-to- moth basis buying raw materials in keeping with its production schedule. Work-in- progress are items of stock that are subjected to further processing to produced the finished product. finished goods inventory allows the firm flexibility in its production scheduling and in its marketing thus there is on incentive to maintain large stocks of all three types of inventory.

In an inflationary environment like Nigeria, there is the need to adopt a realistic inventory valuation method in order to give correct value of inventory in the profit and loss account and in the balance sheet which would have otherwise show an appropriate financial position of the organization and thus negating the purpose of accounting which is the provision of accurate financial information to investors, shareholders, management, government and her agencies and other related interested parties in order to assist them in taking decision about the organization.

It is in view of this that the need arises for an appropriate management and control measure to maintain the most accurate level of stock that will assist management of the organization carryout business in such a way that it does

 not portray the organization in bad shape.


The wide distance between the source of raw material and factories in Nigeria today has posed a great problem to management. Thus the management may not predict with certainty to delivery date of materials. How then does the management ensure that there is no hitch and delay in the supply of raw material to satisfy their day to day requirements without necessarily keeping excessive stock of raw materials and finished goods which represent investment from which no return is expected immediately.

In line with this, the major problem face by management is the determination of what stock to be kept, when to reorder, of what cost to reorder, what the production level should be, how work in process and stages involved should be controlled, movement of finish goods from point of production into the market. The disadvantages associated with huge investment in inventory (tying down of capital, increase in holding/carrying cost etc) act as a detriment in management in committing huge sum of funds in inventory. Conversely making little investment will be disastrous as it will lead to frequent stock out and consequent disruption of production system and incurring additional cost resulting from frequent ordering.

Since no company especially a manufacturing company can operate without keeping stock, it is necessary to check the occurrence of pilferage depletion, damages, breakages, obsolescence etc. among other things.


The primary objective of this research work is to consider inventory control system as described and discussed by different authors. This will be taken as a standard against which the inventory system of the company under study will be appraised to determine its efficiency and suitability in the peculiar environment it operates.

The objectives of this study includes: 

1.    To determine an optimum level of inventory to be maintain by the company under study.

2.    To assess and highlight the different methods of inventory planning, control and valuation and the most appropriate one for a manufacturing company.

3.    To highlight the need for and nature of inventory.

4.    To make viable recommendations on the basis of the out come of the research.

5.    Effect on delivery date with certainty.


The significance of a proper and efficient inventory control and management cannot be over emphasized. Its effect is not only on the individual company but on the economy as a whole.

This study is meant to find solutions to the itching problems of Tower Galvanized Products (TGP) Nigeria limited Kaduna in inventory management and control.

The study will also be of immense benefit to the owners and management of the company under study, their creditors and prospective shareholders who might  wish to invest in the company. This is so because managing inventories efficiently and effectively will help the company to avoid unnecessary investment. It helps the management in quick and accurate decision making. It will also help to build-up the goodwill of the current asset of many companies.

Finally, the knowledge required from this study will broaden the existing knowledge in this field and aid researcher in applying it to other companies or organizations.


With reference to the statement of the problem highlighted above and considering the scope and limitations of this study the following research questions are formulated.

1.    How does the company determine the optimal level of stock to be maintain?

2.    How appropriate is the valuation method given the present inflationary situation?

3.    What determine the level of control to be maintain on various types of stock?

4.    What practical problems are in the ways of progress of inventory management and control in the area under study?

5.    How does the effect of large investment inventory affect the management (holding cost).


This research work is focused on inventory management and control in Tower Galvanize Product (TGP) Nigeria

limited, Kaduna during the year 2001-2006 as it affects the full implementation of the basic concepts of inventory management. Associated issues like inventory procurements, storage and physical distribution policy of the company will also be examined.


1.    Lack of corporation from subjects leading to the use of smaller than the anticipated number this can affect the quality and the generalization of the findings.

2.    Inability to use correct data gathering instrument due to ignorance about their availability

    3.    Low return rate of questionnaires

4.    Using less then fair representative sample due to inability to research subjects.


-    Inventory: This is the list of items held in stock by a company at any particular time.

-    Stock: This consists of all goods and materials stored by an organization. It is a supply of items which are kept for future used.

NB for the purpose of this research work, stock and inventory are sometimes used interchangeably

-    Lead time: This is also known as reorder period or delivery. It is the period of time between ordering and reception of goods ordered for.

-    Re-order level: This is the point at which it is necessary to initiate purchase requisition for new supply of materials.

-    Minimum stock level: This is the level below which stocks should not normally be allowed to fall. It can be said to be buffer or safety stock which makes allowances to cover for error in forecasting the lead time or the demand during the lead time.

-    Maximum stock level: This is the level above which stock should not normally be allowed to rise.



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