Analiza učinkovitosti poslovanja tvrtki za proizvodnju drvenih stolica u Srbiji primjenom DEA metode

This paper deals with the operational efficiency of companies engaged in the production of wooden chairs using selected statistical and DEA (Data Envelopment Analysis) methods. Indicators that typically characterise the supply chain in the production of selected companies were taken as input and output variables for the DEA method. They included three input variables: inventories, material costs and production services costs and one output variable: company’s net profit. The obtained coefficients of correlation pointed to a high degree of correlation between the variables, which justified the performance of an efficiency analysis using the DEA method. The study included 12 companies engaged in the production of wooden chairs. The results of the conducted analyses show that only one company had a relatively satisfactory operational efficiency (efficiency coefficient of 0.83) for the nine-year period. All other companies, especially micro and small enterprises, had unsatisfactorily low operational efficiency. Micro enterprises had the lowest operational efficiency, with an efficiency coefficient of only 0.14. Small enterprises reached the value of 0.3, and large companies 0.67. Medium companies had the most favourable efficiency coefficient of up to 0.83U radu je analizirana učinkovitost poslovanja tvrtki za proizvodnju drvenih stolica primjenom odabranih statističkih metoda i DEA (Data Envelopment Analysis) metode. Kao ulazne i izlazne varijable za DEA metodu izabrani su tipični pokazatelji koji su karakteristični za lanac opskrbe u proizvodnji odabranih tvrtki. To obuhvaća tri ulazne varijable: zalihe, materijalne troškove i troškove proizvodnih usluga te jednu izlaznu varijablu – neto dobit tvrtke. Dobiveni koeficijenti korelacije pokazali su visok stupanj međusobne povezanosti odabranih varijabli, što potvrđuje opravdanost primjene DEA metode za analizu učinkovitosti poduzeća. Istraživanje je obuhvatilo 12 tvrtki koje se bave proizvodnjom drvenih stolica. Rezultati provedene analize pokazuju da je samo jedna od njih u posljednjih devet godina imala relativno zadovoljavajuću učinkovitost poslovanja (koeficijent učinkovitosti 0,83). Sve ostale tvrtke, posebice mikropoduzeća i mala poduzeća, imale su nezadovoljavajuće nisku učinkovitost poslovanja. U mikropoduzećima je zabilježena najmanja učinkovitost poslovanja, s koeficijentom učinkovitosti 0,14. Mala poduzeća postigla su koeficijent učinkovitosti od 0,3, a velika poduzeća od 0,67. Srednja poduzeća imala su najbolji koeficijent učinkovitosti: 0,8

Wood fuels consumption in households in Bosnia and Herzegovina

The paper shows research results for the consumption of all types of wood fuels in the households in Bosnia and Herzegovina and its entities in 2015. The research was conducted in the period from March 15th to August 26th, 2016 in 109 cities/municipalities in the entire Bosnia and Herzegovina. Complex methodological approach was used for conducting the research, which required field research on the sample of 8,602 households on the entire territory of Bosnia and Herzegovina as well as adequate statistical processing of the obtained data pursuant to the high statistical standards. Research results show that in 2015, 5.4 million m3 of firewood, 81,656 tones of wood pellets, and 6,780 tones of wood briquettes were consumed in the households in Bosnia and Herzegovina. Total expenses of households necessary for the supply of wood fuels in Bosnia and Herzegovina in 2015 were 239.8 M€, with the largest share of firewood (226.8 M€), followed by wood pellets (11.6 M€), and wood briquettes (720.9 thousand €). Average firewood consumption per household in Bosnia and Herzegovina is 6.43 m3. Compared to the surrounding countries it is on the level of Slovenia (6.5 m3 per household), less than in Serbia (7.3 m3 per household) and more than in Montenegro (5.49 m3 per household). Average consumption of energy from firewood expressed in kWh/m2 of the heated surface was 252.7 kWh, which is significantly higher than the average in the EU. One of the reasons for such high consumption of wood energy per 1 m2 of the heated surface is the fact that only 36.1% of the households using solid fuels have thermal insulation on their residential facilities