Variations and Extesion Of Time

This is definitely a variation. After adding 20% additional work you cannot hope to get it completed in the original time.

Issuance of insturction for extenion of works surely entitles you variations as well as Extension of Time.

What is the appropriate method to evaluate time impacts of variations ,e.g assume quantities have increased say 20%,is as planned impacted method appropriate,or time impact analysis considering the contractors delay on the date of issue of V.O to be considered,incase of this method ,there is a contractors delay concurent with the v.o,whats the fair evaluation concurent delay EOT without prolongation cost to the contractor if contractors delay is equal to the delay caused to the impact of v.o

Thanks a lot hani,

Still need some clarification,is the eot to be determined based on the as planned impacted method or
time impact analysis method which considers the contractors delay also,accordingly if both the delay already caused by the contractor and the likely delay due to the V.O if both are equal,can the client deny to pay prolongation for the period of eot ,because regardless of the V.O the contractor is already delayed

Refer this thread for concurrent delays

http://www.planningplanet.com/forum/forum_post.asp?fid=1&Cat=7&Top=3492

Dear All

What is to stop you mobilising additional resources to complete the 20% additional work, and still finish on time?
We seem to be constrained by the resources available at the moment. Is this a reasonable constraint?
If it is reasonable / possible to obtain the additional resources, then there is a duty on the contractor to mitigate delays to the contract on the client’s behalf.
There is an entitlement to additional money for additional work, and if it can be shown to be necessary, additional time.