Dokumentation og international benchmarking af bygge - Danmarks ...

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n∑qt i=1i( 1 ) I ==n ∑∑0ii=1qqp0i0ippp0iti0ni=10 i it i( 2 ) gi= n( 3) Ii=0whereiIqt0i0pi∑i=10qp0i0p0ig0iItippit= construction component i, index position i= Index in the period t= weight of the construction component i in the base period= price of the construction component i in the base periodtpi= price of the construction component in the period t (current period)0gi= share of the turnover of the construction component i within thetotal turnover of the construction type in the base periodThe following is valid for Austria, Switzerland and Germany:The basket of construction components and corresponding weights areperiodically adjusted to ensure the representativity of the basket of constructioncomponents and produced indices accordingly. Constructioncomponents are updated from time to time to make sure that they reflectthe current situation in construction including possible changes in constructionmethod, style and quality of the used construction materials.Weights are updated periodically (usually every 5-10 years).The collected prices are sorted out per type, respondent and region. Theyare then calculated in an elementary index and rescaled to a certain yearas the base year. Only matching prices from the same respondent and forthe same construction type are compared between two subsequent periods.For the calculation of a price development of one elementary component(the lowest level for which the weights are available) a geometricmean of the underlying elementary indices is calculated for a region.The calculated indices of the individual elementary components are aggregatedwith the help of the weighting structure and weighting patternof the different construction types to the indices of the major componentsand finally to the total index per construction type and per region. In afurther step, the regional indices are aggregated to the total index for thewhole country.Quality correctionsIt is very important that the price index reflect the price development forthe same construction component between two subsequent periods.77
Germany:There are three cases to be distinguished:1) The construction component is unchanged i.e. the services referring tothe construction component are performed in the same manner as in theprevious period.2) Quality change - if the services referring to the construction componentare performed in a different way and the performance conditions deviateto a bigger extend, the achieved market price should be adjusted, toachieve that the art and the quality of the construction component is thesame as it was in the previous period.3) Change of the construction component- the services underlying thiscomponent is not performed any more in the same way and under thesame conditions as in the previous period. The respondents are asked todescribe the new construction component as it is currently performed andis expected to be performed in the future. The respondent is also asked toreport the price for the new component and to estimate the price for therespective component in the previous quarter.Respondents are always requested to state the reasons for the pricechanges in comparison to the previous period to ensure, that only ‘pure’changes in the prices are captured and not possible improvements inquality.Austria and Switzerland:If a predefined construction type is further specified by the respondent theconstruction components should remain the same as far as possible inorder to ensure comparability. The respondents are asked to report anychanges in quality, which affect prices. All changes in quality, purchasepractice (transport costs) or any other changes having an impact on price(e.g. size, dimension etc.) should be eliminated by simple calculation corrections.FrequencyPublication - timingIn Austria and Germany indices are compiled quarterly. In Switzerlandthe indices are compiled every six months and released in April and October.In Austria and Germany indices are published 40 days after the referenceperiod.In Switzerland indices are published up to 3 months after end of the referenceperiod.Method of data collectionThere are two main methods that can be applied by data collection:• pricing of the construction components for real conducted constructiontypes and• Collecting of prices from the call for tenders, where the prices are collectedfor precisely defined construction types.An effort is always made to collect the actual market prices according tothe nomenclature catalogue defined construction types. Reported prices78
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Dokumentation og internationalbench
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1. Indledning1.1. Baggrund og form
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2. Sammenfatning2.1. Baggrund og fo
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stedet at anvende regnskabsstatisti
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ATP-oplysningerne er korrelerede me
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øget fokus og straf på kommuner,
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3.1.3.2. Byggeomkostningsindeks 2Ud
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Den centraleproblemstillingDet cent
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3.2. Outputprisindeks for bygge- og
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PriserHvad er udfordringen?De prise
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elle byggemetode. For det andet ska
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Hovedpunkterne i tilbagemeldingen v
Page 25 and 26:
Løbende og faste priserDer er foku
Page 27 and 28: ner af variable og erhverv (bl.a. o
Page 29 and 30: underentrepriser udelades (da de ik
Page 31 and 32: Faste priserDet bedst mulige estima
Page 33 and 34: 4. BilagBilag 3.1.1.Beskæftigede v
Page 35 and 36: 4) Andet bygnings- og anlægsarbejd
Page 37 and 38: DataVægtgrundlaget erbaseret på f
Page 39 and 40: Figur 1Påbegyndte boliger, første
Page 41 and 42: Bilag 3.1.4.Dokumentation af beregn
Page 43 and 44: slutningen for tidsperioden med byg
Page 45 and 46: Tabel 3. Reparation og vedligeholde
Page 47 and 48: A.III. Sort bygningsreparation [H45
Page 49 and 50: Tabel 5: Deflatorer til produktions
Page 51 and 52: Optimal bestemmelse af alle variabl
Page 53 and 54: erne for udvælgelsen (demografisk,
Page 55 and 56: systemer. Der bruges nu særdeles r
Page 57 and 58: Bilag 3.1.7.Byggevirksomhed, intern
Page 59 and 60: Holland: Der gennemføres en eller
Page 61 and 62: Andre initiativerOffentliggørelses
Page 63 and 64: Bilag 3.1.8.International benchmark
Page 65 and 66: samlede investeringsomfang på erhv
Page 67 and 68: Ud over ovennævnte hovedtyper find
Page 69 and 70: Germany:• The German National Ban
Page 71 and 72: Construction totalOutput price inde
Page 73 and 74: • VAT and other sales taxes shoul
Page 75 and 76: It is very difficult to make one ge
Page 77: nents. In Germany, reporting of the
Page 81 and 82: Office building 11% 26,4%Dwellings
Page 83 and 84: Itfbrtpfbr= × 100t 0pfbrIndex of c
Page 85 and 86: ConstructionType cRegionaleweights
Page 87 and 88: PlasteringPlastering work (internal
Page 89 and 90: Bilag 3.2.2.International experienc
Page 91 and 92: Bilag 3.2.3.International experienc
Page 93 and 94: In order to calculate the price lin
Page 95 and 96: the usual definition of an output p
Page 97 and 98: They use the t-value as a guideline
Page 99 and 100: Bilag 3.2.4.Output price index for
Page 101 and 102: Figure 1.Conceptual frame: Construc
Page 103 and 104: The representativity of the constru
Page 105 and 106: Matched model methodHedonics method
Page 107 and 108: Bilag 3.2.5.Fra: Finn Bo FrandsenTi
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