Depending on part features, supplier can be both a machine manufacturer (type I), manufacturer of original parts
(type II) or supplier of substitutes of a given part (type III). Depending on degree of part specification, it is accepted
to make at least three supplier inquiries or to order it from the indicated manufacturer, taking supplier type due to the
existing relationship into account. With the exception of a few spare parts, order for each critical part should be made
at the time, when there is a minimum inventory level and it represents difference between the minimum and maximum
stock with regard to orders being implemented.
The primary objective of supply management based on presented model of supplier selection is company
development and long-term reduction of losses arising from costs of inventory maintaining and equipment downtime.
Implementation of purchasing process presented in the model is the basic for optimizing functioning of supply area,
where the main objective is to decrease total cost of supply. Non-quantifiable factor of the model functioning is an
effective cooperation based on engagement in supply-recipient relation, which results in simultaneously minimization
of the number of suppliers who have small strategic importance and maximization of the number of those who have
high development potential. The basis of cost-effectiveness of cooperation is to strive to balanced interdependence,
involving selection of one supplier as an only source of a given item.