Construction Industry Research and Information Association (CIRIA) ndi International Association of Dredging Companies (IADC) angotulutsanso zosintha zapachaka za indexation (2023) za Chitsogozo chamitengo yamitengo yazida 2009.
Kusindikiza kwa Kalozera wamitengo yamitengo ya zida zowotchera 2009 kumapereka njira yokhazikika yokhazikitsira likulu ndi mtengo wofananira wamitundu yosiyanasiyana yazida ndi zida zomwe zimagwiritsidwa ntchito nthawi zambiri pamsika.
Chaka chilichonse, ndondomeko yosinthidwa imakonzedwa ndi IADC's Indexation Cost Standards Committee ndipo imafalitsidwa ndi CIRIA, bungwe losalowerera ndale, lodziimira payekha komanso lopanda phindu.
Bukuli ndi loti ligwiritsidwe ntchito ndi onse omwe akuchita nawo ma projekiti ochepetsa, omwe akuphatikiza alangizi, omwe alipo komanso omwe angakhale makasitomala, opereka ndalama zama projekiti, ma inshuwaransi ndi makontrakitala akugwetsa.
Imalongosola za zida zomwe zimagwiritsidwa ntchito kwambiri ndi zida za dredgers ndi dredging komanso mfundo ndi matanthauzo amiyezo ndi matebulo otsika mtengo.
Matebulowa akuyimira kuwerengera pamitengo yosinthidwa, kutsika kwamitengo ndi chiwongola dzanja komanso mtengo wokonza ndi kukonza zida zamitundu yosiyanasiyana.
Wokonzedwa ndi IADC wokhala ndi zambiri zomwe zasonkhanitsidwa kuti izi zitheke, bukuli limapereka m'malo mwa ntchito zakale, bwalo kapena otumiza kunja kwamitundu ingapo ya zida zokopera kuphatikiza ma trailing suction hopper dredger, cutter suction dredger, boosters, jack-ups ndi mapaipi achitsulo.
Kusindikizaku kumatengera zomwe zachitika komanso ziwerengero zochokera kwa makontrakitala apadziko lonse lapansi omwe ndi mamembala a IADC.