Factors underlying operational JIT purchasing practices: results of an empirical research

Article Abstract:

A survey of 457 respondents from 50 factories was conducted to determine the nature and effect of the interaction between buyers and sellers in line with Just-In-Time purchasing practices. Results show the existence of three underlying factors for such practices, namely, delivery synchronization, interaction on quality and interaction on design and product development. These factors are only partially interrelated and thus, can be treated as separate types of seller-buyer relationship.

Operations research, Management science, Purchasing, Management, Just in time inventory systems, Just in time systems

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Does levelling lead to shortages? an empirical test

Article Abstract:

Income levelling is analyzed in terms of its effect on supply decisions in a prototypic Hungarian firm during the New Economic Mechanism (NEM) period. The analysis uses a modified profit function in an inventory model and an equation featuring a constant term to determine if an imposed constraint is mandatory. The results show that levelling lessens supply in successful industries which make intermediate goods. A shortage in such products results in a shortage in final goods.

Analysis, Economic policy, Hungary, Business enterprises, Inventory shrinkage, Inventory shortages

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The influence of lead-time reductions on decisions and rules in the production planning process

Article Abstract:

Four case studies were considered to determine how lead-time reduction variations in manufacturing and material flow control affect decision making and planning process rules. A time gap is observed for all studied cases, which is attributed to input delay. The deviations carried business effects in surplus inventory, costs from unreliable planning system and poor efficiency and costs due to constant plan changes.

Factory orders, Materials management, Lead time

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