Why are Project Late?

The project can be late due to different factors. Some of the main reasons for late project are as follows:

An unrealistic deadline was established by someone outside the software development group.
Changing customer requirements that are not reflected in schedule changes.
An honest underestimate of the amount of effort and/or the number of resources that will be required to do the job.
Predictable and/or unpredictable risks that were not considered when the project commenced.
Technical difficulties that could not have been foreseen in advance.
Human difficulties that could not have been foreseen in advance.
Miscommunication among project staff results in delays.
A failure by project management to recognize that the project is falling behind schedule and a lack of action to correct the problem.

Project scheduling is key to a projects success!