One of the fundamental economic issues is the problem of making optimal decisions. In logistics theory, the idea of optimal resource and process management is associated with the concept of trade-off. This term is difficult to translate directly into Polish, but it corresponds to our “something for something,” which – simply put – consists of seeking the best solutions from the perspective of the whole. The connections occurring in logistics or production systems very often lead to the emergence of so-called “cost conflicts,” which means that an improvement in one part of the system may be associated with a deterioration in another. However, if this results in an increase in the benefits of the system as a whole, such an action is beneficial. In terms of costs, this means that reducing the operating costs of one element of the system may result in an increase in the costs of another element, e.g., through poorer utilization of existing potential, greater labor input, or increased costs of acquiring necessary resources.
Trade-offs are very often associated with various types of inventories, which results from the fact that inventories are located at the interface of various system elements, and cost conflicts appear precisely at the points where different spheres of economic activity meet, although not exclusively.
A typical example of a trade-off is determining the purchase lot size and, consequently, the frequency of purchase. The trade-off regarding this problem is that reducing the purchase lot size does indeed lower supply inventory costs, but it also increases transport costs (due to frequent shipments in small quantities), the number of commercial orders (the necessity of placing orders more frequently), and purchasing costs (with smaller lots, purchase costs are usually higher due to higher prices). There are many such relationships in a logistics system. These can be, for example, cost concessions related to the number of warehouses in the distribution sphere (between the costs of maintaining finished goods inventory and transport costs), or the production lot size (between production costs and the costs of maintaining finished goods inventory, etc.). The general idea in each case is similar, and the differences lie in the strength of these dependencies (cost conflicts), the direction, and the number of factors that must be taken into account. To solve optimization problems, various methods are used, sometimes mathematical formulas. A trade-off is also a “something for something” relationship between costs and broadly defined quality, which includes not only the quality of the products themselves but also the quality of delivering these products (the level of logistics customer service). Offering a higher level of logistics customer service is often associated with increasing costs, e.g., transport and/or maintaining finished goods inventory. Similarly, increasing product quality is often associated with higher costs incurred, e.g., for purchasing better quality raw materials, for inspection, etc. Many such examples can be given. For example, expanding the production assortment does allow for satisfying the diverse needs of customers, but it entails an increase in costs (e.g., production and inventory maintenance). A trade-off relationship can also appear within various elements of product quality. For example, when it comes to the quality of a food product, aesthetic values (e.g., the color of the product) may be at the expense of reduced consumption safety – the use of artificial dyes that are not neutral to health. Also, within logistics customer service, one often has to make “something for something” choices. For example, at a given cost level, one can offer better punctuality with a longer order fulfillment cycle time or vice versa. Trade-off dependencies can also be observed between elements of product quality and delivery quality. For example, shortening the execution time of a process, e.g., production, by performing certain activities faster, may allow for shortening the order fulfillment time, but it may also result in a decrease in product quality. It should be noted, however, that in no case can the dependencies between quality elements be considered without taking costs into account.
The article comes from the magazine “Logistyka” 5/2005.