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Inventory management is the artwork and science of attaining the set targets of deciding to buy the materials at the lowest viable costs, making sure sufficient go with the flow and making the most economical use of such materials in order that the total cost of production is minimized through the creation of such an environment that would enable the humans make a contribution to the success of the objectives with least quantity of such inputs as money, time, materiality. On the different hand, inventory manipulate is the science primarily based art of making sure that enough inventory is held via an agency to meet economically both its internal and external demand commitments. There can be dangers in holding both very a good deal or too little inventory, as such, inventory control is principally concerned with acquiring the correct balance or compromise between these two extremes. It is therefore, the extent that should be held that management is interested in.
1.2 Inventory management
Organization’s stock is an important component and its management is imperative to the company and cost lessening of the firm’s use.
with entrepreneurs, it is necessary to reconcile the need for available stocks with the cost of excessive stock (Henderson, M., Pytel, D., McCreary, P. and Cortes, G., Flowvision LLC, 2013).
1.6 Problem Statement
Any contracting company must manage its inventories effectively. Inventory management involves identifying inventory that must remain at hand at a given time, decisions regarding the purchase of raw materials in large quantities, the number of times physical orders are placed and the optimal time to submit a request. “Why do we always run out of stock?” A large number of contractors face the frustration and frustration of trying to maintain stable production processes at the same time, providing customers with appropriate services and maintaining investments in equities and equipment at reasonable levels. The fact that statements are made so often indicates the many conflicts of interest (Henderson,
? The research questions (RQ) for this study are:
? Objective 1. What is the amount of economic order of the Aref Contracting Company ?
? Objective 2. Does the company buy in the amount of the economic order?
? Objective 3. What basic inventory models are most common for contractor companies and manufacturing companies?
? Objective 4. What should be the size of the inventory?
any cost savings . Efforts are also made to relate the level of inventory to the level of production and sales. Finally, inventory costs are related to the levels of profit with the aid of basic statistical tools .
1.10 Significant of the Study
It is important to consider the social and economic commitment to the growth of the country . So that all the ways that will improve the company’s growth ,it must be exploited, so the researcher’s hope is that this study is useful for owner of Aref Contractor Company and others.
This research project would help the management of Aref Contractor Company, to identify the most influential risk of inventory management and production. Furthermore, the study will also help the management of the company, to guide against losses .
1.11 Report Organization
In this course, three chapters will be covered that comprises introduction, literature review, and methodology.
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CHAPTER 2

spite of the fact that agreeing to Barnes (2008) stock is looked at as a risk beneath the just-in-time (JIT) control framework. He agrees with the way accountants treat stock as an resource to the organization. Within the explanation of money related position, stock shows up beneath the current resources of the organization in any case whether it’s for benefit or not for benefit organization. Stock plays a major role and its administration goes a long way in making a difference a firm to develop because it relates to its external customers as well as the inner clients (Gibson, 2013). Therefore, stock is basic within the operation of Aref Contractor Company since they may hold stock as finished products, work in progress or raw materials for advance preparing (Fellows and Rottger (2005) and Shapiro (2009)). Shapiro, (2009) also advises that stock plays a crucial part when it comes to demand 15 planning and as a result, the organization needs to be flexible in its management of its stock when it comes to occasional or regular inventories.
Directors cannot avoid inventory management since it shapes the basis of their in general performance through disposal of uncertainties in their management. For the boards and management of Aref Contractor Company to find out that they are performing over standards, inventory management metric measures should be over board so that they may keep up the management’s certainty (Shapiro, 2009). Subsequently, Just-in-time concept has been found to have a few outlandish hidden cost that increment the cost of doing business in a few cases such as little suppliers to expansive companies .
In any case, the management of stock is important because the firm will be keen to guarantee that its resources and stock are well managed and request estimating is improved to avoid spontaneous acquirement. Stock can double up as stock and resources respectively. Therefore, when an organization improves request estimating, it enables the minimization of operational costs as well as client satisfaction (Hines and Bruce, 2007). When this is often done, it enables an organization plan for the longer term consequently applying different factors that an organization can use for its objective achievement to be specific: request and supply, taken a toll and staff requirements.
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2.3 HISTORICAL SKETCH OF INVENTORY PROBLEMS: Although inventory problems are as old as history itself, it has only been since the turn of the century that an
The inventory system is basically an input-output system. In order to arrive at the best inventory policy i.e. the best decision rules for when and how much to order, it is necessary to have a clear picture of the inventory system.
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Figure 1 An input-Output representation of an Inventory System.
2.5 PROBLEM OF INVENTORY MANAGEMENT:
The problem of inventory involves the formulation of decision rules that answer two important questions:
1. When to place an order (or configure it for production) to restoreinventory?
2. How much should you ask for (or produce) for each supply? the decision-making rules should aim to meet the expected demand at a minimum or maximum cost of benefits. (Puche, J., Ponte, B., Costas, J., Pino, R. and De la Fuente, D., 2016).
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In many situations, our assumptions about known quatity and zero or constant delay are not valid. Demand and delay are often variable quantities, so we know best only their probability distribution. If we assume that the question and the delay are random variables, the analysis of the inventory management problem will become very complex. It has been found, however, that reasonably good situations can be obtained for many practical inventory management problems by assuming that the delay is a known constant.
2.6 Inventory management techniques
Inventory management techniques are extremely critical for business operations because their success and cost decrease of the firm’s use require improved supply chain performance and information to the workers (Lambert, 2008). These procedures are basic and information in them is profoundly desirable in this way, managers and obtainment staff need to be able to apply the procedures for the advantage of the organization (Fellows and Rottger, 2005).
Wild (2002) suggests, proper warehousing of stock so that when products items are requested, they are kept at the warehouse for the least time possible minimizing holding cost of stock. Consequently, other operational costs may increase inventory management costs. The way an organization is able to maintain its costs at low levels the way better it is for the year end profits (Palevich, (2012), Wisner, Tan and Leong (2011)). Organizations purchase and sell their stock; there continuously arises balance at the end of the year which have to be be carried over to the next year. Once an organization realizes this, it can create online stock management tool to monitor its stock information by breaking it down into groups by
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connecting the categories with its clients. Since organizations works differently in numerous fields, the stock can be classifies by either seasons or financial year conclusion of your most critical clients thus, request forecasting got to be employed to have an proficient supply chain (Poiger, 2010).
2.6.1 Re-Order Level
As organization endeavor to achieve effectiveness, they should be able to understand their ReOrder Levels (ROL) which empowers them know
organizations try to progress on the stock management, the Economic Order Quantity (EOQ) and Re-order Point (ROP) are critical tools that organizations can use to guarantee that stock supply does not hit a stock out as explained by Gonzalez and Gonzalez (2010). Over time, organizations have been keeping up their stock in a haphazard way which has required a change within the way firms conduct their business. Stock outs have been experienced adversely leading to client dissatisfaction hence; firms are changing their approach to be able to stay important by employing Economic Order Quantity (EOQ) and Re-order Point (ROP) for client satisfaction.
The derivation of the basic EOQ model (Quantity of economic order) is quite simple in a situation
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Figure 2 EQO Equivalents
To determine the economic order quantity given the fixed demand assumption, we can
evaluate the following model:
D = Total annual demand in unit
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Q = Economic order quantity in unit
D/Q = Number of orders placed and received during the year
Q/2 = Average inventory
Co = Cost of placing an order
Cc = Carrying cost per unit of inventory during the year
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Total inventory cost is defined as the whole of ordering cost and carrying cost. To define total inventory cost in terms of the controllable variable order amount (Q), we must express both types of cost in terms of amount. Total ordering cost can be gotten by multiplying the number of orders D/Q by the cost of placing an order (Co), consequently:
Annual ordering cost = D/Q Co
So also, annual carrying cost can be found by multiplying the carrying cost per unit of inventory (Cc) by the average number of units in stock (Q/2). This expression for average inventory accept a steady rate of demand all through the year.
Annual carrying cost = D/2 Cc
Combining the two components, we get total inventory cost for the period:
TC = D/Q Co + Q/2 Cc
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Review that this variable can be controlled by management to yield the least cost for inventory amid a particular time period. From Fig. 2.5.2 we know that optimum solution is that quantity (Q*) that can therefore be gotten by setting the equation for ordering cost equals to the equation for carrying cost and solving for Q: thus:
Annual carrying cost = annual carrying cost
Cc Q/2 = DCo/Q
Cc Q2 = 2DCo
Q2 = 2DCo/Cc
Equation 1
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The ideal solution is also obtained by separating the total cost function to get an equation that expresses the rate of change in total cost with respect to changes in quantity. When the first derivative of the total cost function is set equal to zero, the economic order quantity is obtained by solving for Q.
The operation is as follows in three steps:
1. Take the first derivatives of total cost function:
TC = D/Q Co + Q/2 CC
d(TC)/dQ = -DCo/Q2 + Cc/2
2. Set the first derivative equal to zero, and solve for Q:

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Just-in-time (JIT) is a positive performance to the company . Inventory should be managed by using JIM to reduce loses and customer`s satisfaction. Invontory management in organizations that kept too much stock in their warehouse were an wasteful supply chain, whereas those that kept very few stock in their warehouse were exceptionally productive (Lai and Cheng, 2009). Thus, it was found out that keeping direct stock is nice and it empowers an organization work minimal costs of holding costs as well as keep setup cost at bare minimum, increase
Management of inventory decides the way an organization will pushed itself to tall performance efficiency. A few organizations have resulted to vendor managed inventory (VMI) systems which help the provider to monitor customer’s stock usage. Through this VMI system, clients will avoid stock outs since the suppliers will have already recharged their inventory. The key viewpoint here is communication which should be planned well from the starting of business relations between the supplier and the customer (Frahm, 2003). Vendor managed inventory saves an organization immense finance and time since the supplier will be able to monitor its customer’s stock levels and make a point of replenishing them. As the client and supplier connected, the communication channel has to be clear and quick so that they may avoid instances of stock
The balanced scorecard has been used to evaluate the quality of inventory management performance measure and its improvement. In any case, the balance scorecard complements financial measuhas multi-discipline functionalities in its operations. The performance management of Aref Contractor Company has been improved and progressed to foster smooth running of the institution over Jeddah ,Saudi Arabia by guaranteeing that clients are treated well (Sutherland, David and Alistair, 2002).
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2.7 Theoretical Recommendation
It is expected that the application of Economic Order Amount, Marginal Analysis, and Just-in-Time, will improve Aref Contractor Company performance. As the staff gets it the strengths of having these strategies, at that point the unnecessary costs caused will be avoided. Therefore, the strategies will progress performance within the following ways:
No Inventory Management Techniques How Performance Improvement will be achieved 1 Economic Order Amount Ability to know how much and when to replenish stock 2 Activity Based Costing Analysis The organization is able to account for each inventory according to its classification and this can be achieved through the Pareto analysis . 3 Just-in-Time Requesting stock when they are required thus reducing

It would have been best to conduct this research in all the manufacturing companies and contractors companies in Saudi Arabia in arrange to seek after excellence and at the same time achieve the most excellent possible result. However, such a huge amount of companies will pose a few issues. As a result of the attendant monetary, time and other limitations, the research has limited this investigation to only one contractor company in Saudi Arabia: Aref Contractor Company.
3.2 Method for Information collection and analysis
The information used for this investigation were collected from primary and secondary sources of information.

instruments and other means of information collection were found convenient for this study because they helped to induce the view of the literate members of the company . Secondly, in a investigate work of this nature, where information collected will be totally analyzed, the researcher considered it very shrewd to use more of questions in order to avoid gathering of information that will have very small or no pertinence to the subject matter beneath study. Also, considering the kind of respondent being tended to, it was found most attractive because it does not require expound reply. Most of the questions are basic “yes” or “no” type. However others are such that require the respondent to rate a statement into choices; such as “strongly agreed”, “undecided”, “disagree” etc. The survey, generally utilizes a printed format that efficiently indicates all the questions as well as the arrangement to which they are to be presented. All these steps were made for easier investigation of information and result.
3.2.2 SECONDARY SOURCES
The result of existing literatures on stock management helped in~measurablyi n directing the researcher during the study. Other secondary sources of information include:
1.Newspapers
2.Magazines and Periodicals
3.Reference books and Dictionaries
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4.Course reading materials
5.Secondary information also exists within the company
6.Examination of the company’s yearly reports and journals.
3.3 Pilot survey
A pilot overview was carried out to eliminate all ambiguous questions from the study instrument used. The pilot study was similarly carried out since the level of understanding contrasts among the respondents. The sample for this pre-testing was drawn from the company reviewed. The

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