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V magistrski nalogi je obravnavan nov sistem notranjega transporta materiala v proizvodnji brizganih komponent. Gre za sistem avtonomnih mobilnih robotov v kombinaciji z ostalo opremo za ravnanje z materialom. Pred postavitvijo takega sistema je smiselno izdelati simulacijo, zato smo s pomočjo programskega orodja Flexsim izdelali simulacijski model celotne tovarne skupaj z vso opremo za ravnanje z materialom. Simulirali smo različne scenarije in določili okvirno število avtonomnih mobilnih robotov, delavcev in preverili ustreznost ostale opreme. Z analizo toka vrednosti smo izvedli primerjavo starega in novega sistema in s tem potrdili ustreznost sistema. This master's thesis addresses a new material handling system at a manufacturing plant producing moulded components. The system includes autonomous mobile robots combined with other material handling equipment. A simulation should be carried out prior to the set-up of such a system. Therefore, the Flexsim software was used to make a simulation model of the whole factory together with all the material handling equipment. Various scenarios were simulated, an indicative number of autonomous mobile robots and workers was determined, and the adequacy of other equipment was verified. The old and the new systems were compared using value stream mapping, confirming the suitability of the system.

Z uvajanjem novih izdelkov v proizvodni program podjetja so se v proizvodnji pojavila ozka grla, ki smo jih skušali rešiti z racionalizacijo. Za proizvodni program podjetja je bila izdelana ABC analiza, iz katere je bilo razvidno, da bomo največji učinek racionalizacije dosegli, če naredimo spremembe pri izdelavi vitel. Odločili smo se, da za polizdelke 2x10EH pesto zobnika, 3,5E–5,5EH puša škripca in za 6,5EH–9,5EH puša škripca namesto vhodnega materiala jeklene palice in cevi, naročimo izdelavo odkovkov in s tem pocenimo proizvodnjo, skrajšamo pretočne čase naročil in se izognemo strojem, ki so ozka grla ali pa le skrajšamo čas obdelave na njih. With introductions of new products into the company’s manufacturing program, bottlenecks appeared in the program, which we tried to solve by racionalisation. The ABC analysis was made for the company’s manufacturing program from which it was seen, that the highest effect of racionalisation would be achived, by changing the manufacturing program for forestry winches. We have decided, that for semi-finished products 2x10EH hub of gear, 3,5E-5,5EH bush of pulley and for 6,5EH-9,5EH bush of pulley instead of the input material of the steel rod and tubes, we order manufacturing of forging parts and thus lowering production cost, shorten the flow time of orders and avoid machines, which are bottlenecks or we just shorten the processing time on them.

V hudem konkurenčnem boju se na trgih obdržijo samo proizvodna podjetja, ki dobavljajo široko paleto izdelkov vrhunske kakovosti v kratkih rokih in po nizkih cenah. Kupci zaradi zahtev po kratkih dobavnih rokih, možnostih spreminjanja naročil ter njihovih količin in fleksibilnosti in zanesljivosti dobav postavljajo proizvajalce pred zelo zahtevne naloge. Zato podjetja stremijo k nenehnemu izboljšanju učinkovitosti in optimizacije proizvodnega procesa. Osnovni namen magistrskega dela je razviti model dinamičnega planiranja serijske proizvodnje v obravnavanem podjetju, zato naloga najprej predstavlja spoznanja domače in tuje literature s področja planiranja proizvodnje, nadalje preučuje stanje sedanjega sistema planiranja v izbranem podjetju ter na podlagi opravljene raziskave ponudi nov model dinamičnega planiranja proizvodnje za potrebe delovanja podjetja. V zadnjih letih se je podjetje soočilo z velikimi spremembami v poslovanju in spremembi proizvodnih programov. Te spremembe so povzročile predvsem probleme pri planiranju in vodenju proizvodnje, kar se izraža v nenehnih zamudah do kupcev, ki pa so tudi posledica slabo izkoriščenih strojev. Magistrsko delo se v prvem delu naloge ukvarja s teoretičnimi izhodišči planiranja proizvodnje, kjer so predstavljeni in pojasnjeni različni proizvodni sistemi, ki se uporabljajo v podjetjih vsepovsod po svetu. V nadaljevanju podrobneje opisujemo različne koncepte materialnega toka proizvodnega sistema, ki se uporabljajo pri planiranju in vodenju proizvodnje. Četrto poglavje opisuje obravnavano podjetje, na primeru katerega v petem poglavju postavimo izhodišča za razvoj dinamičnega planiranja proizvodnje. Z empiričnim delom v zaključku magistrske naloge preučujemo, kako bi uvedba novega, dinamičnega modela planiranja proizvodnje lahko pripomogla k temu, da bi podjetje v povprečju bolje izkoristilo razpoložljivo strojno opremo in tudi zmanjšalo zamude v proizvodnji. V sklepnem delu podajamo svoj pogled na uvedbo novega sistema planiranja proizvodnje v obravnavanem podjetju ter opredelimo izhodišča, s katerimi se bodo druga podjetja lažje odločala za implementacijo bolj optimalnega sistema planiranja proizvodnje v svojo organizacijo. Nowadays, when companies are faced with huge market competition, it is crucial for their existence on the market that they provide large range of high quality products in short terms and at low prices. Buyers are putting manufacturers in front of difficult tasks, due to their demand for short term supply, later changes of ordered products and their quantity, expectation of flexibility and reliable supply. Mentioned factors are the main reason why companies strive towards constant improvement of efficiency and optimization of production process. Basic purpose of this thesis is to develop a model of dynamic planning in mass production for the discussed company. Therefore, thesis deals with findings of national and international literature in the field of production planning, further on studies the condition of current planning system of the discussed company and provides a new model of dynamic planning in mass production for the operational needs of discussed company as a result of conducted research. In the last years, the discussed company was faced with large changes in the way company was doing business and with production programs. These changes led to problems with production planning and control, which consequentially meant constant delays in relation to buyers. The latter is also a consequence of inefficient machinery usage. First part of the thesis deals with theory concepts of production planning and provides explanation of different models of production planning that are used all over the world. Furthermore, we provide detailed description for different concepts of material flow of production system that is used for production planning and control. Chapter 4 deals with description of discussed company, which is used as an example for the basis of development of a new, dynamic planning production model. In the empirical part of the thesis we study how an implementation of a new dynamic planning production model would be beneficial to the discussed company in a sense of a better, more efficient machinery usage and prevention of possible delays in the production process. The conclusion of the thesis provides our own view of a new production planning model, developed for implementation to the discussed company, and defines fundamentals that other companies can take into consideration, when deciding to implement the most optimal production planning system in their organization.

Podjetje Talum Aluminij d.o.o. se ukvarja s proizvodnjo primarnega aluminija in izdelavo ter sestavljanjem anodnih blokov. Glaven problem, ki ga bom v diplomski nalogi obravnaval, je povečanje produktivnosti zalivanja anod. Raziskovalni del obsega meritve časa posameznih operacij. Na vsaki operaciji sem izvedel več meritev in na ta način dobil povprečen čas na določeni operaciji. Posvetil sem se tudi zastojem v procesu proizvodnje. Z metodo klasifikacije in komporacije sem ugotovil ozka grla proizvodnega procesa in jih z ugotovitvenimi predlogi poskušal odpraviti. Rezultate, ki sem jih predstavil, se navezujejo na stroj za odstranjevanje povratne kopeli. Na podlagi predstavljenih rezultatov sem ugotovil, katere so tiste slabosti, ki se pojavljajo v sami proizvodnji, s svojimi predlogi pa sem poskušal odpraviti ozka grla. The company Talum Aluminij d.o.o. is engaged in the production of primary aluminum and manufacturing and assembly of anode blocks. The major problem, which I will discuss in this thesis, is to increase the productivity of irrigation of anodes. The research includes measurements of time of individual operations. At every operation I performed several measurements and thus got the average time for a particular operation. I also dedicated my research to the delays in the production process. With the methods of classification and comparation I discovered bottlenecks in the production process and then I tried to eliminate them with the identified suggestions. Results presented here relate to the machine to remove feedback baths. In light of the results I found out what those weaknesses that occur in the production itself were, but with my suggestions I tried to eliminate bottlenecks.

V diplomski nalogi smo se osredotočil na problematiko ozkih grl, ki ne bremenijo samo Slovenije, ampak večino razvitih držav. Ozka grla so vse bolj pogosta predvsem zaradi rasti cestnega prometa in ne toliko zaradi slabe cestne infrastrukture, kar nekateri žal zmotno mislijo. Po našem mnenju je infrastruktura slovenskih cest, razen nekaterih izjem, dovolj dobra. Obnovitvena dela res predstavljajo ozka grla, predvsem na avtocestah in hitrih cestah, vendar so ta dela potrebna zaradi preobremenjenosti cest in se njihovo stanje zaradi tega slabša. This thesis focuses on problems of bottlenecks, that they don't charge only Slovenia, but majority of developed states. Bottlenecks are more and more frequent because of growth of road traffic and not this much because of bad road infrastructure, which, unfortunately, some mistakenly think. In our opinion the infrastructure of Slovene roads is good enough, with some exceptions. Regenerative works are introducing bottlenecks, above all on motorways and main roads, however roads need these works, because of overload and their condition because of this gets worse.