?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%2F84%2F&rft.title=Planning+drinking+water+for+airplanes&rft.creator=Bijvank%2C+Marco&rft.creator=Dobber%2C+Menno&rft.creator=Soomer%2C+Maarten&rft.creator=Botton%2C+Quentin&rft.creator=de+le+Court%2C+El%C3%A9onore&rft.creator=Van+den+Schrieck%2C+Jean-Christophe&rft.creator=de+Viron%2C+Mo%C3%AFra&rft.creator=Cisneros-Molina%2C+Myriam&rft.creator=Schmitz%2C+Klaus&rft.creator=van+der+Hofstad%2C+Remco&rft.creator=Jochemsz%2C+Ellen&rft.creator=Mussche%2C+Tim&rft.creator=Summer%2C+Martin&rft.creator=Hoekstra%2C+Maroescha&rft.creator=Mulder%2C+Jeroen&rft.creator=Paelinck%2C+Mark&rft.subject=Food+and+Drink&rft.subject=Aerospace+and+defence&rft.description=The+management+of+the+Dutch+national+airline+company+KLM+intends+to+bring+a+sufficient+amount+of+water+on+board+of+all+flights+to+fulfill+customer%E2%80%99s+demand.+On+the+other+hand%2C+the+surplus+of+water+after+a+flight+should+be+kept+to+a+minimum+to+reduce+fuel+costs.+The+service+to+passengers+is+measured+with+a+service+level.+The+objective+of+this+research+is+to+develop+models%2C+which+can+be+used+to+minimize+the+amount+of+water+on+board+of+flights+such+that+a+predefined+service+level+is+met.+The+difficulty+that+has+to+be+overcome+is+the+fact+that+most+of+the+available+data+of+water+consumption+on+flights+are+rounded+off+to+the+nearest+eighth+of+the+water+tank.+For+wide-body+aircrafts+this+rounding+may+correspond+to+about+two+hundred+litres+of+water.+Part+of+the+problem+was+also+to+define+a+good+service+level.+The+use+of+a+service+level+as+a+model+parameter+would+give+KLM+a+better+control+of+the+water+surplus.+The+available+data+have+been+analyzed+to+examine+which+aspects+we+had+to+take+into+consideration.+Next%2C+a+general+framework+has+been+developed+in+which+the+service+level+has+been+defined+as+a+Quality+of+Service+for+each+flight%3A+The+probability+that+a+sufficient+amount+of+water+is+available+on+a+given+flight+leg.+Three+approaches+will+be+proposed+to+find+a+probability+distribution+function+for+the+total+water+consumption+on+a+flight.+The+first+approach+tries+to+fit+a+distribution+for+the+water+consumption+based+on+the+available+data%2C+without+any+assumptions+on+the+underlying+shape+of+the+distribution.+The+second+approach+assumes+normality+for+the+total+water+consumption+on+a+flight+and+the+third+approach+uses+a+binomial+distribution.+All+methods+are+validated+and+numerically+illustrated.+We+recommend+KLM+to+use+the+second+approach%2C+where+the+first+approach+can+be+used+to+determine+an+upper+bound+on+the+water+level.&rft.date=2005-02-04&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%2F84%2F1%2Fwater.pdf&rft.identifier=++Bijvank%2C+Marco+and+Dobber%2C+Menno+and+Soomer%2C+Maarten+and+Botton%2C+Quentin+and+de+le+Court%2C+El%C3%A9onore+and+Van+den+Schrieck%2C+Jean-Christophe+and+de+Viron%2C+Mo%C3%AFra+and+Cisneros-Molina%2C+Myriam+and+Schmitz%2C+Klaus+and+van+der+Hofstad%2C+Remco+and+Jochemsz%2C+Ellen+and+Mussche%2C+Tim+and+Summer%2C+Martin+and+Hoekstra%2C+Maroescha+and+Mulder%2C+Jeroen+and+Paelinck%2C+Mark++(2005)+Planning+drinking+water+for+airplanes.++%5BStudy+Group+Report%5D+++++