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A Statistical Model for Shutdowns due to Air Quality Control for a Copper Production Decision Support System

100%
Aboura K.
Organizacija
|
2015
|
vol. 48
|
issue 3
198-202
EN
Background: In the mid-1990s, a decision support system for copper production was developed for one of the largest mining companies in Australia. The research was conducted by scientists from the largest Australian research center and involved the use of simulation to analyze options to increase production of a copper production facility. Objectives: We describe a statistical model for shutdowns due to air quality control and some of the data analysis conducted during the simulation project. We point to the fact that the simulation was a sophisticated exercise that consisted of many modules and the statistical model for shutdowns was essential for valid simulation runs. Method: The statistical model made use of a full year of data on daily downtimes and used a combination of techniques to generate replications of the data. Results: The study was conducted with a high level of cooperation between the scientists and the mining company. This contributed to the development of accurate estimates for input into a support system with an EXCEL based interface. Conclusion: The environmental conditions affected greatly the operations of the production facility. A good statistical model was essential for the successful simulation and the high budget expansion decision that ensued.
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Adresowanie programów zatrudnienia

63%
Maksim M., Wojdyło-Preisner M.
Polityka Społeczna
|
2013
|
vol. 40
|
issue 3(468) O skuteczną politykę rynku pracy
15-18
EN
Well targeted active labour market policies create better prospects for achieving higher net employment outcomes. The paper analyses two alternative approaches to targeting labour market programs and identifies their strengths and possible limitations. The first approach refers rather to equity and solidarity arguments while the second to efficiency matters. The article provides also an example of a good practise in the area of targeting labour market policy by describing a statistical support system which can predict the labour market outcome for each program and then suggest an optimal labour market program for each unemployed.
PL
Prawidłowe adresowanie aktywnych polityk rynku pracy jest ważnym czynnikiem wpływającym na ich skuteczność w rozumieniu oddziaływania na zatrudnienie. Artykuł prezentuje ewolucję zagadnienia adresowania polityki rynku pracy, koncentrując uwagę na solidarnościowej i proefektywnościowej koncepcji alokowania bezrobotnych do programów zatrudnienia. Wskazuje argumenty za i przeciw ich stosowaniu. Artykuł zawiera również opis nowoczesnego narzędzia do adresowania polityki rynku pracy, bazującego na modelowaniu ekonometrycznym, które pozwala wybrać dla konkretnego bezrobotnego optymalną pod względem skuteczności formę wsparcia.
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