Temat: inventory control - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Decision support of spare parts supply
Autorzy:: Kot, S.
Łodziński, J.
Tematy:: inventory control
purchase costs; Pokaż więcej
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Powiązania:: https://bibliotekanauki.pl/articles/122459.pdf Link otwiera się w nowym oknie
Opis:: Decisions concerning the way of purchasing spare parts affect the level of the generated costs of collecting and maintaining stocks as well as the level of maintaining the continuity of production in enterprises. To learn about different situations of spare parts purchasing appearing in real economic conditions there has been conducted the simulation of different scenarios of spare parts purchase in connection with the selected factors. In this paper the case study for replacement parts used in a printing house was considered. As a result of the analysis, the best option to purchase replacement parts was indicated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An OWAS-based Analysis of Storekeeper Workloads
Autorzy:: Grzybowska, Katarzyna
Tematy:: inventory control
OWAS method
workload; Pokaż więcej
Wydawca:: Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Powiązania:: https://bibliotekanauki.pl/articles/503806.pdf Link otwiera się w nowym oknie
Opis:: Since 1950s’ attention has been paid in enterprises to customize complex technical structures to meet worker’s needs. However, work creates negative for worker’s health static posture which adversely affects worker’s workload. The following research paper introduces certain problematic aspects of static load risk management of staff employed. The issue in question is quite relevant in warehouse labour ergonomics as well as effective organization and handling of tasks. The paper discusses OWAS method as a means to evaluate worker’s workload. It also presents the employment of the method to analyse storehouse workload.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dead-Beat and reaching law based sliding mode control laws for perishable inventories with transportation losses
Autorzy:: Bartoszewicz, A.
Maciejewski, M.
Tematy:: sliding mode control
perishable inventories
inventory control; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229507.pdf Link otwiera się w nowym oknie
Opis:: This paper describes discrete sliding mode (SM) supply management strategies for inventory systems with perishable goods and transportation losses. In the considered systems, the stock used to satisfy the unknown, bounded and time-varying demand is replenished with some delay from a distant supply source. The on-hand stock deterioration during lead-time delay, as well as commodity losses in supply process are explicitly taken into account. Two supply management strategies are proposed. The first one ensures fast reaction to the imposed demand variations, but may result in excessive control signal magnitude at the beginning of the inventory management process. Therefore, in order to conform to supplier limitations we also develop an alternative control strategy based on the concept of the reaching law. That strategy helps reduce the initial supply rate and satisfy the supplier limitations. A number of desirable properties of both proposed strategies are formulated and formally proved. These properties include full customer demand satisfaction and elimination of the risk of exceeding the warehouse capacity.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Comprehensive approach to the inventory control system improvement
Autorzy:: Krajčovič, M.
Plinta, D.
Tematy:: inventory control system
inventory analysis
ABC/XYZ analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/407413.pdf Link otwiera się w nowym oknie
Opis:: This paper describes a methodology for inventory analysis and reduction, which was developed at the Department of Industrial Engineering, Faculty of Mechanical Engineering, University of Zilina. The methodology describes the optimal procedure for the application of basic analytical methods and tools in practice. The results of the analysis are in the algorithm linked to the subsequent actions realized to improve inventory management system and to minimize inventory level in the company. Described procedure is the result of methodology examination and verification in practical conditions of production enterprises. In the following sections of this paper, there are presented a comprehensive approach to the inventory analysis and the own algorithm, which contains 3 phases: inventory analysis on enterprise level, summary analysis of individual item groups and individual analysis of material items. In the last section, there are described examples of results from such analysis and conclusions. The presented approach is an attempt to create a universal procedure of analysis which integrates methods and tools described in various publications.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Adaptive inventory control system for material items with continuous non-stationary demand
Autorzy:: Krajčovič, M.
Plinta, D.
Tematy:: inventory control
algorithm
non-stationary demand
joint replenishment
inventory analysis; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/406736.pdf Link otwiera się w nowym oknie
Opis:: This paper describes an algorithm of dynamic inventory control system for large numbers of material items with continuous non-stationary demand. It uses principles of pull inventory control systems, statistical inventory analysis and joint replenishment inventory systems. This algorithm was processed in software module (VBA for Excel) and applied in practice. The target of described algorithm is to keep an optimum inventory level and optimum customer service level in terms of inventory control of items with non-stationary demand.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Dead-time compensation in continuous-review perishable inventory systems with a remote supply source
Autorzy:: Ignaciuk, P.
Bartoszewicz, A.
Tematy:: inventory control
perishable inventory systems
time-delay systems
Smith predictor; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229449.pdf Link otwiera się w nowym oknie
Opis:: In this paper we address the problem of efficient control of continuous-review perishable inventory systems. In the considered systems the goods at a distribution center used to fulfill unknown, variable demand deteriorate at a constant rate, and are replenished with delay from a remote supply source. We develop a new supply policy which incorporates the Smith predictor for dead-time compensation. A number of properties of the designed policy is formulated, and strictly proved. In particular, we show that the policy guarantees that the assigned storage space at the distribution center is never exceeded which means that the cost of emergency storage is eliminated. Moreover, we show that with appropriately chosen controller parameters all of the demand imposed at the distribution center is realized from the readily available resources, thus ensuring the maximum service level.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Shop floor-level control of manufacturing companies: an interview study in Finland
Autorzy:: Tokola, H.
Järvenpää, E.
Salonen, T.
Lanz, M.
Koho, M.
Niemi, E.
Tematy:: demand forecasting
shop floor control
production flexibility
inventory control
interview; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/407355.pdf Link otwiera się w nowym oknie
Opis:: This paper publishes the results of interviews regarding shop-floor-level control of 18 Finnish manufacturing companies. The interviews had 17 open questions relating to demand characteristics, shop floor-level control issues, production flexibility, inventory control, and potential development areas. In order to get insights from the interviews, this paper analyses the answers from the interviews and categorises them into typical answers. The companies that were interviewed are also categorised as small companies with their own end products, subcontractors, or large companies with their own end products, and the emphasis of the analysis is on how companies differ in their shop floor-level control. The results show that different types of companies have different characteristics. Small companies are characterised by constant workflow, seasonal trends in demand, and the use of forecasts. Subcontractors have great daily variation in their demand and processing times. Large companies tend to focus on inventory issues.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A periodic inventory control system with adaptive reference stock level for long supply delay
Autorzy:: Chołodowicz, E.
Orłowski, P.
Tematy:: inventory control
inventory system
delay system
discrete-time systems
control sysyems
periodic inventory system; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/114709.pdf Link otwiera się w nowym oknie
Opis:: Modern inventory control is anchored in vastly advanced and complex models, which require considerable computational efforts. In this paper, we use a mathematical model of an inventory system with large supply delay and control system in order to optimize goods flow in inventory systems. The paper proposes the use of automatic control systems to control the system for supplementary orders. A discrete-time, dynamic model of the warehouse system is assumed for the analysis. For the given model, two automatic control systems: adaptive and classical non-adaptive periodic inventory systems , are analyzed. The non-adaptive control system is well known in the literature and the second one is its extension. The parameters of the control system are tuned by minimizing the cost function using a genetic algorithm for the assumed scenario for the market demand. Results of numerical simulations of the dynamical system and selected results in the objective space are presented in the paper.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Goal Setting in the Newsvendor Problem with Uniformly Distributed Demand
Autorzy:: Bieniek, Milena
Tematy:: Kontrola stanu zapasów
Zagadnienie gazeciarza
Inventory control
Newsvendor problem; Pokaż więcej
Wydawca:: Uniwersytet Ekonomiczny w Katowicach
Powiązania:: https://bibliotekanauki.pl/articles/578526.pdf Link otwiera się w nowym oknie
Opis:: In the paper we introduce the newsvendor problem with a satisficing-level objective, which is defined as maximization of the probability of exceeding the moving target. This target is defined as the expected profit, multiplied by a positive constant. The constant is chosen by the management and it indicates whether the low or the high goal should be achieved. We obtain closed form solutions of this newsvendor model with uniformly distributed demand. Additionally, we consider a bicriteria problem with the satisficing- -level and the classical objective.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Sliding mode control of periodic review perishable inventories with multiple suppliers and transportation losses
Autorzy:: Bartoszewicz, A.
Maciejewski, M.
Tematy:: discrete time sliding mode control
sliding surface design
inventory control; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/200764.pdf Link otwiera się w nowym oknie
Opis:: The purpose of this paper is to develop robust and computationally efficient supply chain management strategy ensuring fast reaction to the demand variations for periodic review perishable inventory systems. For that purpose, we apply a sliding mode approach and we propose a new discrete time warehouse management strategy. The strategy employs the sliding hyperplane appropriately designed to ensure a dead-beat performance of the closed loop system. Our strategy not only explicitly takes into account decay of goods stored in the warehouse (perishing inventories) but it also accounts for transportation losses which take place on the way from suppliers to the warehouse. The proposed strategy ensures full customers’ demand satisfaction, minimizes the on-hand inventory volume and prevents from exceeding the warehouse capacity. This reflects the need of simultaneous minimization of the lost sales costs and inventory holding costs. Furthermore, the strategy ensures that the ordered quantities of goods are always non-negative and upper bounded. These favourable properties of the proposed strategy are formally stated as a lemma and three theorems and proved in the paper.
Dostawca treści:: Biblioteka Nauki

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