<p>The aim of this doctoral thesis is to develop a methodology that will allow the selection of lean methods and tools that are applicable in the service systems &ndash; hospitals and to explore the issues about implementing the lean concept in clinical laboratories. The need for such approach lies in the fact that the implementation of the lean concept in healthcare enables the elimination of all unnecessary processes. This doctoral dissertation presents development of the framework for the implementation and application of the lean concept in clinical laboratories, which allow modernization of institutional arrangements, both organizational and managerial.</p> / <p>Cilj ove doktorkse disertacije jeste razvoj metodologije koja će obezbediti odabir lean metoda i alata koji su pogodni za implementaciju u uslužnim sistemima - bolnicama kao i da istraži problematiku prilikom implementacije lean koncepta u kliničkim laboratorijama. Potreba za ovakvim pristupom leži u činjenici da se implementacijom lean koncepta u zdravstvu obezbeđuje eliminisanje svih nepotrebnih procesa. Doktorska disertacija predstavlja razvoj podloga za implementaciju i primenu lean koncepta u kliničkim laboratorijama koji će omogućiti modernizaciju institucionalnog uređenja kako organizacionog tako i menadžerskog.</p>

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This project investigated the effects of process capability, line station operation efficiency, and line balance on the product throughput of a wooden door manufacturing process using time-and-motion study and simulation methods. The problem-solving approach DMAIC was used to identify root causes to the problems and implemented the process improvements for the production line efficiency and throughput based on lean manufacturing concepts. The investigation results indicated that the main operation of the wooden door manufacturing process was based on manual and semi-automatic operations. The process capability of whole operation before implementing process improvements was around 600 doors monthly. The coefficient of variation of process time for manual operation ranged from 12% to 23%. The semi-automatic operation ranged from 2% to 20%. The average station efficiency and throughput was 31% and 20 doors per day respectively. After implementing the removal of obvious motion waste, the processing time of the whole process reduced 22.9%. The reduced process time variation for manual operation ranged from 9% to 14%, and the semi-automatic operations ranged from 3% to 7%. The final product output had a 200% increase and the total process efficiency had 100% improvement after implementing the improved process flow design. Meanwhile, the average station efficiency and output increased to 61% and 65 doors per day, respectively.

The thesis is focused on the evaluation of internal communication channels in implementing lean concepts in the production company . As part of the assessment of the current situation and a proposal to eliminate or critical bottlenecks . It contains basic concepts of lean concepts and characteristics of internal communication. In the analytical part , on the basis of theoretical knowledge described the current situation in society, both in the administrative as well as in the manufacturing sector . In the final part are suggested solutions to improve internal communications when implementing a lean approach .