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Towards a common European methodology for <strong>Life</strong> Cycle Costing (<strong>LCC</strong>) – Guidance Document<br />

58<br />

Results (continued)<br />

The <strong>LCC</strong>-criteria should be related<br />

more thoroughly <strong>to</strong> other<br />

requirements and specifications in<br />

the contract <strong>to</strong> avoid negative<br />

unforeseen effects. Expansion<br />

joints give a good example that<br />

illustrates the unforeseen effects of<br />

conflicting requirements, <strong>as</strong> they<br />

can make up 20 <strong>to</strong> 30% of<br />

maintenance costs for viaducts.<br />

Conclusions and benefits<br />

<strong>Life</strong> <strong>cycle</strong> costs were incorporated <strong>as</strong> a criterion for determining the<br />

(economically) most profitable bid in the tender of functionally specified<br />

contracts. By considering life <strong>cycle</strong> costs in a tender process, contrac<strong>to</strong>rs<br />

were encouraged <strong>to</strong> design, develop and offer solutions that are profitable<br />

and beneficial on a longer term. This is not only in the interest of the<br />

procurer but also offers contrac<strong>to</strong>rs a better opportunity <strong>to</strong> distinguish<br />

themselves in terms of quality and service. In addition, parties may gain from<br />

design optimisation for maintenance.<br />

The <strong>LCC</strong>-tender for A4 Burgerveen - Leiden w<strong>as</strong> successful in a sense that<br />

the expected maintenance costs where reduced considerably, without having<br />

a considerable effect on the <strong>construction</strong> cost. Contrac<strong>to</strong>rs were given the<br />

opportunity <strong>to</strong> distinguish themselves by offering a balanced life <strong>cycle</strong><br />

design and development of innovations that imply savings on life <strong>cycle</strong> cost.<br />

Contact details<br />

Jaap Bakker<br />

Civil Engineering Division, Ministry of Transport Public Works<br />

& Water Management<br />

Utrecht, The Netherlands<br />

E-mail: jaap.bakker@rws.nl<br />

Davis Langdon Management Consulting May 2007

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