Unreasonable" deadlines are a fact of life in the software business. How should you proceed if you're faced with one?

As most developers can attest, unrealistic timelines for software projects are common. But so many estimates wind up, although causes can range from poor decision making by inexperienced project managers to simple miscommunication, If you know what leads to unreasonable estimates, you stand a better chance of preempting problems before the schedule is built. Let some typical reasons why projects wind up with unreasonable estimates

Based on my experience, I believe that the major causes of unreasonable deadlines are

• Lack of experience
• Business pressure
• Poor communication
• Organizational dysfunction

Document our reservations using quantitative arguments derived from past project metrics. Then suggest an incremental approach that offers to deliver partial functionality in the time allotted with complete functionality following.