Main reasons of the construction project delay.?

Inefficient management, Construction implementation failure, Environmental catastrophes/Unavoidable events, Scope increase and Economical changes, Failure in coordination between time schedule and execution.

Delay in approvals due to variation between design and requirement of clint 

Similarly, delay in payment of contractors and suppliers after project completion could lead to dispute and delay in signing the certificate of final completion of the project. Delay and cost overrun of slow closeout can be avoided when the project closure phase is implemented as planned.

Unexperienced management and workers, poor supervision, non-availability of required equipment’s and machines, slow decision making, Dissatisfied workers, lack of communication between workers and management, people with less knowledge on top management, poor time management.