# Rozdíly

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en:pocet_nabidek [2019/10/01 11:27] Tomáš Ducháček [How do we evaluate this?] |
en:pocet_nabidek [2020/01/20 13:00] (aktuální) Tomáš Ducháček [How do we evaluate this?] |
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Řádek 25: | Řádek 25: | ||

The second step in our calculation is to compute the aggregate indicator as the weighted sum of k indicators across all contracts awarded by the respective contracting authority. The [[en:Objem_zakazek|awarded price]] of every contract is used as its weight, in order to emphasize the indicator results for bigger contracts. The resulting weighted sum is then divided by the total value of the relevant authority's contracts. Contracts with an undefined number of tenders are excluded from the evaluation, as authorities are already penalized for these through the [[en:kvalita_dat_ve_vestniku|Journal information quality]]y indicator. | The second step in our calculation is to compute the aggregate indicator as the weighted sum of k indicators across all contracts awarded by the respective contracting authority. The [[en:Objem_zakazek|awarded price]] of every contract is used as its weight, in order to emphasize the indicator results for bigger contracts. The resulting weighted sum is then divided by the total value of the relevant authority's contracts. Contracts with an undefined number of tenders are excluded from the evaluation, as authorities are already penalized for these through the [[en:kvalita_dat_ve_vestniku|Journal information quality]]y indicator. | ||

- | $$z_5 = \frac{\sum contract\:value*k}{total\:contracts\:value}$$ | + | $$z_5 = \frac{\sum \sqrt{contract\:value}*k}{\sum\sqrt{contract\:value}}$$ |

Purchases using the commodity markets (where number of bidders is not available) are evaluated as having 5 bidders, which is slightly above average for respective commodities (natural gas and energy). | Purchases using the commodity markets (where number of bidders is not available) are evaluated as having 5 bidders, which is slightly above average for respective commodities (natural gas and energy). |