What makes good teams to fail?

Over the years I have seen many good teams make a few common mistakes that led them to failures. In this post, I have picked up 5 case studies where teams with good track record of success failed to meet their goals. These teams worked at companies of different size & culture. The project work included enterprise web application development, custom force.com application development, and Salesforce.com integration with other cloud applications, process change management, and sales and marketing for a start-up product/services.

After seeing the teams repeating these common-sense mistakes over and over again, I come to believe that common sense is not common after all. Watch out for the early symptoms of failure and correct your course before it is too late.