Inventory Management

INVENTORY MANAGEMENT INTRODUCTION: Inventory is a list of goods and materials, or those goods and materials themselves, held available in stock by a business. Inventory are held in order to manage and hide from the customer the fact that manufacture/supply delay is longer than delivery delay, and also to ease the effect of imperfections in the manufacturing process that lower production efficiencies if production capacity stands idle for lack of materials. The reasons for keeping stock All these stock reasons can apply to any owner or product stage. Buffer stock is held in individual workstations against the possibility that the upstream workstation may be a little delayed in providing the next item for processing. Whilst some processes carry very large buffer stocks, Toyota moved to one (or a few items) and has now moved to eliminate this stock type. Safety stock is held against process or machine failure in the hope/belief that the failure can be repaired before the stock runs out. This type of stock can be eliminated by programmes like Total Productive Maintenance Overproduction is held because the forecast and the actual sales did not match. Making to order and JIT eliminates this stock type. Lot delay stock is held because a part of the process is designed to work on a batch basis whilst only processing items individually. Therefore each item of the lot must wait for the whole lot to be processed before moving to the next workstation. This can be eliminated by single piece working or a lot size of one. 2 Demand fluctuation stock is held where production capacity is unable to flex with demand. Therefore a stock is built in times of lower utilisation to be supplied to customers when demand exceeds production capacity. This can be eliminated by increasing the flexibility and capacity of a production line or reduced by moving to item level load balancing. Line balance stock is held because different sub-processes in a line work at different rates. Therefore stock will accumulate after a fast sub-process or before a large lot size sub-process. Line balancing will eliminate this stock type. Changeover stock is held after a sub-process that has a long setup or change-over time. This stock is then used while that change-over is happening. This stock can be eliminated by tools like SMED. Where these stocks contain the same or similar items it is often the work practice to hold all these stocks mixed together before or after the sub-process to which they relate. This 'reduces' costs. Because they are mixed-up together there is no visual reminder to operators of the adjacent sub-processes or line management of the stock which is due to a particular cause and should be a particular individual's responsibility with inevitable consequences. Some plants have centralized stock holding across sub-processes which makes the situation even more acute. The basis of Inventory accounting Inventory needs to be accounted where it is held across accounting period boundaries since generally expenses should be matched against the results of that expense within the same period. When processes were simple and short then inventories were small but with more complex processes then inventories became larger and significant valued items on the balance sheet. This need to value unsold and incomplete goods has driven many new behaviours into management practise. Perhaps most significant of these are the complexities of fixed cost recovery, transfer pricing, and the separation of direct from indirect costs. This, supposedly, precluded "anticipating income" or "declaring dividends out of capital". It is one of the intangible benefits of Lean and the TPS that process times shorten and stock levels decline to the point where the importance of this activity is hugely reduced and therefore effort, especially managerial, to achieve it can be minimized. 3 Objective: To save the cost by efficient Inventory Management. Sub- Objective: What are the different types of Stocks How Supply Chain Management is helpful in managing the Inventory Roll of logistics department in Inventory Management How Inventory is different from Logistics Methodology: To start with extensive study of Inventory Management literature and its various applications. The literature of Inventory Management sourced from magazines, eBooks, industry article and educational websites. Taking lead from literature review we look into depth to explore the possibility of its application in industries. Hereby we analyse its role, scope and its benefits. 4 Literature review: Traditionally, marketing, distribution, planning, manufacturing, and the purchasing organizations along the supply chain operated independently. These organizations have their own objectives and these are often conflicting. Marketing's objective of high customer service and maximum sales dollars conflict with manufacturing and distribution goals. Many manufacturing operations are designed to maximize throughput and lower costs with little consideration for the impact on inventory levels and distribution capabilities. Purchasing contracts are often negotiated with very little information beyond historical buying patterns. The result of these factors is that there is not a single, integrated plan for the organization---there were as many plans as businesses. Clearly, there is a need for a mechanism through which these different functions can be integrated together. Supply chain management is a strategy through which such integration can be achieved. Moreover, shortened product life cycles, increased competition, and heightened expectations of customers have forced many leading edge companies to move from physical logistic management towards more advanced supply chain management. Additionally, in recent years it has become clear that many companies have reduced their manufacturing costs as much as it is practically possible. Therefore, in many cases, the only possible way to further reduce costs and lead times is with effective supply chain management. In addition to cost reduction, the supply chain management approach also facilitates customer service improvements. It enables the management of: . inventories, . transportation systems and . whole distribution networks 5 so that organizations are able to meet or even exceed their customers' expectations. SUPPLY CHAIN MANAGEMENT A supply chain is a network of facilities and distribution options that performs the functions of procurement of materials, transformation of these materials into intermediate and finished products, and the distribution of these finished products to customers. Supply chains exist in both service and manufacturing organizations, although the complexity of the chain may vary greatly from industry to industry and firm to firm. Supply chain management is typically viewed to lie between fully vertically integrated firms, where the entire material flow is owned by a single firm and those where each channel member operates independently. Therefore coordination between the various players in the chain is key in its effective management. Cooper and Ellram [1993] compare supply chain management to a well-balanced and well-practiced relay team. Such a team is more competitive when each player knows how to be positioned for the hand-off. The relationships are the strongest between players who directly pass the baton (stick), but the entire team needs to make a coordinated effort to win the race. Below is an example of a very simple supply chain for a single product, where raw material is procured from vendors, transformed into finished goods in a single step, and then transported to distribution centers, and ultimately, customers. Realistic supply chains have multiple end products with shared components, facilities and capacities. The flow of materials is not always along an arborescent network, various modes of transportation may be considered, and the bill of materials for the end items may be both deep and large. 6 To simplify the concept, supply chain management can be defined as a loop: it starts with the customer and ends with the customer. All materials, finished products, information, and even all transactions flow through the loop. However, supply chain management can be a very difficult task because in the reality, the supply chain is a complex and dynamic network of facilities and organizations with different, conflicting objectives. Supply chains exist in both service and manufacturing organizations, although the complexity of the chain may vary greatly from industry to industry and firm to firm. Unlike commercial manufacturing supplies, services such as clinical supplies planning are very dynamic and can often have last minute changes. Availability of patient kit when patient arrives at investigator site is very important for clinical trial success. This results in overproduction of drug products to take care of last minute change in demand. R&D manufacturing is very expensive and overproduction of patient kits adds significant cost to the total cost of clinical trials. An integrated supply chain can reduce the overproduction of drug products by efficient demand management, planning, and inventory management. Many manufacturing operations are designed to maximize throughput and lower costs with little consideration for the impact on inventory levels and distribution capabilities. Purchasing contracts are often negotiated with very little information beyond historical buying patterns. The result of these factors is that there is not a single, integrated plan

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