Revision of IFC drawing

Presumably, your managers with possess a contract document that will have anticipated project variations covering the content of your question. Consult it to determine the answers you require.

I checked construction philosophy of the current project and applicable contract documents.But it doesnot mention anything about pipe foul issue during erection. I strongly feel, field mismatch is due to sabotage of aliens

Not French poloocemen, then?

It's not your problem.

It's the Project Manager's problem.

The reasons for Pipe fouling are not possible to determine based on the information.. if the fabrication and construction is being carried out to the the standards and details of Construction Issue drawings & SPECIFICATION then the issue is design related either in terms of materials specified or physical layout.

In relation to delays,inefficient working etc.. that is a contractual issue and there are provisions in contracts to deal with these.. Usually notifications to client/ clients project management is required and followed details of delays and associated costs..

Changes are variations, while lost time and inefficient working are claims.. difference being variations are usually quantifiable and easy to cost by both parties.. claims tend to be harder to quantify as disagreement over times, amount of resources etc..

Records will be hugely important in the resolution of this issue.. Detailed records need to be kept on When issue arose, When client Informed, Timescale to Solution, time & resources standing due to issue, Time & Resources to implement solution.. Project QS should be looking after this based on information provided by site management

Dependent on the client and your relationship with them.. maybe in your interest to agree additional costs prior to works where possible and get them signed off. Also add them to interim accounts as they arise.. Otherwise you could be faced with war of attrition when it comes to settling the accounts..