1) If the work quality is not acceptable & for that if contractor is told to remove the work done, owner will loose the material So it is the duty of owner to appoint engineer to do construction supervision to the Satisfaction of consulting engineer.
2) Since owner is providing the material, there may be wastage of material from labour contractor.
With material contractor
- Responsible for the quality construction as he will face big loss if the engineer does
not approve the workmanship, and Quality of work is not as expected to the
Satisfaction of consulting engineer.
- Here there are chances of using Inferior/cheaper quality material for Execution of work. there are lot of advantages & disadvantages to be decided to choose a contractor which itself is a task to be assigned to your consulting engineer.
Consulting engineer required to check the quantities of the executed work on site and certify the bills of contractors for payment by owners.