?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F320%2F&rft.title=Comparable+aggregated+indicators+of+QoS+in+the+telecoms+market&rft.creator=Karolina%2C+Baldys&rft.creator=Szymon%2C+Charzynski&rft.creator=Karolina%2C+Klepek&rft.creator=Krzysztof%2C+Pytka&rft.creator=Mateusz%2C+Zawisza&rft.subject=Information+and+communication+technology&rft.description=The+Polish+telecommunication+company+TP+SA+provides+diversified+services+for+alternative+operators+(AO).+The+quality+of+these+services+is+measured+periodically+using+the+so-called+Key+Performance+Indicators+(KPI).%0D%0A%0D%0AThere+are+more+than+500+alternative+operators+and+63+different+KPIs+that+measure+the+quality+of+services.+The+Office+of+Electronic+Communications+(UKE)+receives+periodic+reports+for+each+operator+with+specific+data+which+can+be+arranged+in+one+table.+This+table+has+a+lot+of+cells+that+are+not+filled+and+its+structure+may+differ+in+time%2C+which+poses+the+problem+of+how+to+compare+alternative+operators+and+indicate+eventual+discrimination.+Proposed+was+the+concept+of+defining+discrimination.+This+approach+is+based+on+some+additional+parameters%2C+which+were+determined%2C+however%2C+they+have+not+been+collected+so+far.%0D%0A%0D%0AThe+main+challenge+was+to+design+aggregated+indicators+measuring+the+quality+of+services+rendered+by+the+wholesale+telecommunication+operator+to+alternative+operators.+The+indicators+must+be+comparable%2C+i.e.+they+should+indicate+whether+some+AOs+are+favoured+or+discriminated.%0D%0A%0D%0AAs+a+result%2C+two+different+methods+of+computing+aggregated+indicators+were+proposed.+The+first+one%2C+Principal+Component+Analysis%2C+is+based+on+the+reduction+of+data+dimension%2C+which+facilitates+further+analysis.+It+shows+whether+some+AOs+are+treated+in+a+different+way%2C+when+compared+with+others.+This+may+indicate+discrimination.%0D%0A%0D%0AThe+second+method+aggregates+all+values+of+KPIs+and+assigns+a+real+number+to+each+alternative+operator.+Subsequently%2C+rankings+of+AOs+treatment+can+be+set+up.+This+method+enables+detection+of+a+discriminated+operator+and+was+tested+in+simulations.&rft.date=2011&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F320%2F1%2FESGI77_KPI_report.pdf&rft.identifier=++Karolina%2C+Baldys+and+Szymon%2C+Charzynski+and+Karolina%2C+Klepek+and+Krzysztof%2C+Pytka+and+Mateusz%2C+Zawisza++(2011)+Comparable+aggregated+indicators+of+QoS+in+the+telecoms+market.++%5BStudy+Group+Report%5D+++++