Possible Impacts on a typical software project...

There are lot of factors which may have an impact on any project.
Broadly they can be categorised into areas such as

1> Scope creep or Changing business needs: (it all matters at what stage theadditional changes are being suggested and how important are the scope enhancements for the requestor. Sometimes changes are so important that they can't live without them. Also the changes are introduced at such a later stage in the project life cycle, where it becomes almost inevitable to scrap the existing project and raथे r start with new one).

2> Cost management, Budget Planning: This is definitely one of the important aspects.
Due to the changing dynamics and the always changing priorities and strategies of business, budget is always fluctuating. I have seen many examples, where project starts, funds approved during baseline, but then suddenly funds are dried up or funds diverted to some other important priority items. In that case also no other option than to wind up.

3> Performance Issues: It's like unexpected performanceresults. I have seen few examples during my expereince where due to the performance criteria, almost near to completions projects were halted.

4> Changing Dynamics , Take overs, mergers: Many times projects are required to wind up due to these changing dynamics.

5> Schedule Overun, Quality issues are few of the issues which may cause an impact on the project and need to be closely watched.