INTRODUCTION
The accounting system is a major qualitative information acquired in almost every organization for and it therefore provides information for the three broad purpose namely as internal reporting to managers for use, in planning and control routine operation and non-routine operation, formulation or major plan and polices and lastly the external reporting to stock-holders, government, debenture holder and other outside parties.            Therefore the managers depends largely upon quality and quantity of data received. Thus, information flows in the management information system too by influence the effectiveness of decision making.
According to Hornaren (1977) the question of what accounting system to buy, must focus on how decision and consequent benefit are going to be affected. One must also ask what decision will result from accounting data and what outcome will ensure from decision making. Accounting report, which are financial model or company operations, model are useful because they provide conceptual representation or realities, enabling the decision makers to anticipate and measure the effect of alternative actions.
Decision-making is choosing among alternatives it occurs as managers perform their planning and controlling function. A decision model is one, which affect the performance of management planning and controlling functions, but only to extent that management delegate when the model was constructed and implemented the functions. In every organization, the accountants is the quantitative expert, and to retain and improve his status, and also the accountant should be aware of how the mathematical models may improve planning and evaluating the quantitative sources of decision recommendation, as the accountant is usually a member of the top management team in every organization.
According to Thranf (1978) general stated that a model is defined as a representative of an actual object of situation. A formal decision model measures predicted effects of alternative action. However it is pertinent to note that accounting to the report of the committees on management decision model may indicate a choice which is rejected by management because of more dominant legal, sociological, psychological, political and other considerations not included in the specific mode is only one input into a more complicated decision model, which include quantitative as well as quantitative dimension.
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1.2  STATEMENT OF THE RESEARCH PROBLEM
Budgeting is an important tool in business organization some of these organization have budgeting departments which is saddled with the responsibility of preparing budget statement for each unit, department and branches of the organization the department also monitors the execution of the budget estimates with the purpose of ensuring that the budget target is achieved in terms of revenue and that the expenditure does not exceed the estimates, this is the aspect of budgetary control. Not much problem is encountered during during budgeting process; major problems lies in the area of budgeting control, the following problem are usually encountered in the budgeting control.
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1.3 OBJECTIVE OF THE STUDY
The study is aimed at providing general review of investment decision making processes in manufacturing companies this entail how the projects are initiated, enalyed and by whom. Other objectives of the study include:
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1.4 SIGNIFICANCE OF THE STUDY
This study will be most relevant to the management of organization in determine the choice of investment project among various investment opportunities or alternatives and secondly for any decision maker should at his disposal, the best qualitative and quantitative tool which are available, so that he may establish a frame of reference for the decision past literature on the research have been too general without going special consideration to the bottling company and in fact, have been too theoretical. The research is therefore intended for use by manager and accountant especially in the bottling industry in implementation of decision-making task in a more efficient manner and also to serve as a pointer to further research on the topic.
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1.5  RESEARCH QUESTION
In order to guide and direct the study, the following questions were used:
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1.6  SCOPE AND LIMITATION OF THE STUDY
This research is intended to cover the various cost accounting models used as sources or tools for managerial decision making with participant reference to model that are particular and applicable to the Nigerian bottling company plc, Ilorin as well as its various branches all over the federation.
This research study would be limited due to time and financial constraints of the Nigerian Bottling Company Plc Ilorin and is hoped that any findings of the research would be applicable to the other branches of the company and the bottling industry in general.
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1.7  PLAN OF THE WORK
The structure of the research work is divided into five chapters. Chapter one (the introduction) this contained general background to the study (literature review) of the study will shed light on the work of deferent author, researcher in related fields and review of every journal and literature that related and relevant to the research study. Chapter three (research methodology) of the study will show method of data collections how they are going to be analyzed and quantified using chi square method brief history of the case- study Nigerian bottling company will be discussed in this chapter. Chapter four (data analysis and presentation) will contain data presentation and analysis with particular reference to the case study Nigerian Bottling Company this chapter will cover the application of every information discussed in chapter two and three on the case study (NBC) of the research work. Chapter five (summary of conclusion and recommendation) which is the last chapter is going to summarize the research work, inferences will be drawn on the research problem under study and based on the conclusions drawn, recommendation will be made to the case-study (Nigerian Bottling Company) of the research problem on what appraisal techniques to use with reason or criteria for choosing such techniques.
1.8   DEFINITION OF THE KEY TERMS
This has been defined to suit the context of this writing in order to avoid certain misconception that may arise.
A  cost; this is the amount if expenditure in carried on or attributable to a specified thing or activity and at the simplest level. A cost is determined by two components (the quantity and the price)
B  cost unit; as defined by I.C.M .A, is a quantitative unit of product or service in relation to which cost are ascertained whenever costing is coursed out, the focus is to determine the cost resist of the product or service.
C   COST ALLOCATION; this is the changing of discrete and identification of item of cost center of cost unit. It is the allotment of whole item of cost to center or cost unit that is responsible fort its authorization.
D COST ASCERTAINMENT; This the identification of the right or appropriate cost a factory is N70000, or the what is cost to pay the nurses salary, it may be 25000 or the word cleaners may receive 15000 and doctors receive 35000.
E COST ABSORPTION; it also refers to cost that has been a cost center by either allocation or apportionment and absorbed into cost unit.
F COST APPORTIONMENT; This is the process of sharing commonly incurred expenses proportionately where two or as more cost center are involved, based on the amount of benefit each cost center derived from it.
G  COST CONTROL; This is an act of making necessary adjustment after comparing the actual cost with a standard a targeted cost. Where the actual exceeds the targeted cost a reduction in cost may become necessary.
H  COSTUING CENTER; as defined in the terminology it is a location, person or times of equipment in respect of which cost unit for control purpose.
I  COST CODE; According to I.C.M.A is s system of symbol designed to applied to a classified set of item to gives a brief accurate reference facilitating entry, collation and analysis. The symbol may be mainly series of numbers or alphabet or mature of both.
J     FIXED COST; this is a cost that does not change with the change with the change in the level of activity. It remains static over a period of time. Unaffected by variations in the level of activity and volume of product.
K     VARIABLE COST; this is also changes in the level of change in activity. Any increase or decrease in the volume of production result in a proportionate change in cost.